Reference ranges for blood tests

Reference ranges for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples.

Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the area of pathology that is generally concerned with analysis of bodily fluids.

Blood test results should always be interpreted using the reference range provided by the laboratory that performed the test.^[1]

Interpretation

A reference range is usually defined as the set of values 95 percent of the normal population falls within (that is, 95% prediction interval).^[2] It is determined by collecting data from vast numbers of laboratory tests.

Plasma or whole blood

In this article, all values (except the ones listed below) denote blood plasma concentration, which is approximately 60-100% larger than the actual blood concentration if the amount inside red blood cells (RBCs) is negligible. The precise factor depends on hematocrit as well as amount inside RBCs. Exceptions are mainly those values that denote total blood concentration, and in this article they are:

• All values in Hematology - red blood cells (except hemoglobin in plasma)
• All values in Hematology - white blood cells
• Platelet count (Plt)

A few values are for inside red blood cells only:

• Vitamin B₉ (Folic acid/Folate) in red blood cells
• Mean corpuscular hemoglobin concentration (MCHC)

Units

• Mass concentration (g/dL or g/L) is the most common measurement unit in the United States. Is usually given with dL (decilitres) as the denominator in the United States, and usually with L (litres) in, for example, Sweden.
• Molar concentration (mol/L) is used to a higher degree in most of the rest of the world, including the United Kingdom and other parts of Europe and Australia and New Zealand.^[3]
• International units (IU) are based on measured biological activity or effect, or for some substances, a specified equivalent mass.
• Enzyme activity (kat) is commonly used for e.g. liver function tests like AST, ALT, LD and γ-GT in Sweden.^[4]
• Percentages and time-dependent units (mol/s) are used for calculated derived parameters, e.g. for beta cell function in homeostasis model assessment or thyroid's secretory capacity.

Arterial or venous

If not otherwise specified, a reference range for a blood test is generally the venous range, as the standard process of obtaining a sample is by venipuncture. An exception is for acid-base and blood gases, which are generally given for arterial blood.

Still, the blood values are approximately equal between the arterial and venous sides for most substances, with the exception of acid-base, blood gases and drugs (used in therapeutic drug monitoring (TDM) assays).^[5] Arterial levels for drugs are generally higher than venous levels because of extraction while passing through tissues.^[5]

Usual or optimal

Reference ranges are usually given as what are the usual (or normal) values found in the population, more specifically the prediction interval that 95% of the population fall into. This may also be called standard range. In contrast, optimal (health) range or therapeutic target is a reference range or limit that is based on concentrations or levels that are associated with optimal health or minimal risk of related complications and diseases. For most substances presented, the optimal levels are the ones normally found in the population as well. More specifically, optimal levels are generally close to a central tendency of the values found in the population. However, usual and optimal levels may differ substantially, most notably among vitamins and blood lipids, so these tables give limits on both standard and optimal (or target) ranges.

In addition, some values, including troponin I and brain natriuretic peptide, are given as the estimated appropriate cutoffs to distinguish healthy people from specific conditions, which here are myocardial infarction and congestive heart failure, respectively, for the aforementioned substances.

Variability

References range may vary with age, sex, race, pregnancy,^[6] diet, use of prescribed or herbal drugs and stress. Reference ranges often depend on the analytical method used, for reasons such as inaccuracy, lack of standardisation, lack of certified reference material and differing antibody reactivity.^[7] Also, reference ranges may be inaccurate when the reference groups used to establish the ranges are small.

Sorted by concentration

A separate printable image is available for mass and molarity

Smaller, narrower boxes indicate a more tight homeostatic regulation when measured as standard "usual" reference range.

By units

Units don't necessarily imply anything about molarity or mass.

A few substances are below this main interval, e.g. thyroid stimulating hormone, being measured in mU/L, or above, like rheumatoid factor and CA19-9, being measured in U/mL.

By enzyme activity

White blood cells

Sorted by category

Ions and trace metals

Included here are also related binding proteins, like ferritin and transferrin for iron, and ceruloplasmin for copper.

Test	Lower limit	Upper limit	Unit	Comments
Sodium (Na)	135,[9] 137[4][10]	145,[4][10] 147[9]	mmol/L or mEq/L[9]
	310,[11] 320[11]	330,[11] 340[11]	mg/dl
Potassium (K)	3.5,[4][9] 3.6[10]	5.0,[4][9][10] 5.1	mmol/L or mEq/L[9]	See hypokalemia or hyperkalemia
	14[12]	20[12]	mg/dl
Chloride (Cl)	95,[9] 98,[13] 100[4]	105,[9] 106,[13] 110[4]	mmol/L or mEq/L[9]
	340[14]	370[14]	mg/dl
Ionized calcium (Ca)	1.03,[15] 1.10[4]	1.23,[15] 1.30[4]	mmol/L
4.1,[16] 4.4[16]	4.9,[16] 5.2[16]	mg/dL
Total calcium (Ca)	2.1,[9][17] 2.2[4]	2.5,[4][17] 2.6,[17] 2.8[9]	mmol/L
8.4,[9] 8.5[18]	10.2,[9] 10.5[18]	mg/dL
Total serum iron (TSI) - male	65,[19] 76[10]	176,[19] 198[10]	µg/dL
11.6,[20][21] 13.6[21]	30,[20] 32,[21] 35[21]	μmol/L
Total serum iron (TSI) - female	26,[10] 50[19]	170[10][19]	µg/dL
4.6,[21] 8.9[20]	30.4[20]	μmol/L
Total serum iron (TSI) - newborns	100[19]	250[19]	µg/dL
18[21]	45[21]	µmol/L
Total serum iron (TSI) - children	50[19]	120[19]	µg/dL
9[21]	21[21]	µmol/L
Total iron-binding capacity (TIBC)	240,[19] 262[10]	450,[19] 474[10]	μg/dL
43,[21] 47[21]	81,[21] 85[21]	µmol/L
Transferrin	190,[22] 194,[4] 204[10]	326,[4] 330,[22] 360[10]	mg/dL
	25[23]	45[23]	μmol/L
Transferrin saturation	20[19]	50[19]	%
Ferritin - Male	12[24]	300[24]	ng/mL
	27[25]	670[25]	pmol/L
Ferritin - Female	12[24]	150[24]	ng/mL
	27[25]	330[25]	pmol/L
Ammonia	10,[26] 20[27]	35,[26] 65[27]	μmol/L
	17,[28] 34[28]	60,[28] 110[28]	μg/dL
Copper (Cu)	70[18]	150[18]	µg/dL
	11[29][30]	24[29]	μmol/L
Ceruloplasmin	15[18]	60[18]	mg/dL
	1[31]	4[31]	μmol/L
Phosphate (HPO4^2−)	0.8	1.5[32]	mmol/L
Inorganic phosphorus (serum)	1.0[9]	1.5[9]	mmol/L
	3.0[9]	4.5[9]	mg/dL
Zinc (Zn)	60,[33] 72[34]	110,[34] 130[33]	μg/dL
9.2,[35] 11[4]	17,[4] 20[35]	µmol/L
Magnesium	1.5,[18] 1.7[36]	2.0,[18] 2.3[36]	mEq/L or mg/dL
0.6,[37] 0.7[4]	0.82,[37] 0.95[4]	mmol/L

Acid-base and blood gases

If arterial/venous is not specified for an acid-base or blood gas value, then it generally refers to arterial, and not venous which otherwise is standard for other blood tests.

Acid-base and blood gases are among the few blood constituents that exhibit substantial difference between arterial and venous values.^[5] Still, pH, bicarbonate and base excess show a high level of inter-method reliability between arterial and venous tests, so arterial and venous values are roughly equivalent for these.^[38]

Test	Arterial/Venous	Lower limit	Upper limit	Unit
pH	Arterial	7.34,[10] 7.35[9]	7.44,[10] 7.45[9]
	Venous	7.31[39]	7.41[39]
[H^+]	Arterial	36[9]	44[9]	nmol/L
		3.6[40]	4.4[40]	ng/dL
Base excess	Arterial & venous[39]	-3[39]	+3[39]	mEq/L
oxygen partial pressure (pO2)	Arterial pO2	10,[9] 11[41]	13,[41] 14[9]	kPa
		75,[9][10] 83[18]	100,[10] 105[9]	mmHg or torr
	Venous	4.0[41]	5.3[41]	kPa
		30[39]	40[39]	mmHg or torr
Oxygen saturation	Arterial	94,[39] 95,[13] 96[18]	100[13][18]	%
	Venous	Approximately 75[13]
Carbon dioxide partial pressure (PCO2)	Arterial PaCO2	4.4,[9] 4.7[41]	5.9,[9] 6.0[41]	kPa
		33,[9] 35[10]	44,[9] 45[10]	mmHg or torr
	Venous		5.5,[41] 6.8[41]	kPa
		41[39]	51[39]	mmHg or torr
Absolute content of carbon dioxide (CO2)	Arterial	23[39]	30[39]	mmol/L
		100[42]	132[42]	mg/dL
Bicarbonate (HCO3^−)	Arterial & venous	18[18]	23[18]	mmol/L
		110[43]	140[43]	mg/dL
Standard bicarbonate (SBCe)	Arterial & venous	21, 22[9]	27, 28[9]	mmol/L or mEq/L[9]
		134[43]	170[43]	mg/dL

Liver function

Test	Patient type	Lower limit	Upper limit	Unit	Comments
Total Protein		60,[9] 63[10]	78,[9] 82,[10] 84[18]	g/L	see hypoproteinemia
Albumin		35[9][44]	48,[10] 55[9]	g/L	see hypoalbuminemia
		3.5[10]	4.8,[10] 5.5[9]	U/L
		540[45]	740[45]	μmol/L
Globulins		23[9]	35[9]	g/L
Total Bilirubin		1.7,[46] 2,[9] 3.4,[46] 5[4]	17,[9][46] 22,[46] 25[4]	μmol/L
		0.1,[9] 0.2,[10] 0.29[47]	1.0,[9][18] 1.3,[10] 1.4[47]	mg/dL
Direct/Conjugated Bilirubin		0.0[9] or N/A[4]	5,[9] 7[4][46]	μmol/L
		0[9][10]	0.3,[9][10] 0.4[18]	mg/dL
Alanine transaminase (ALT/ALAT[4])		5,[48] 7,[10] 8[9]	20,[9] 21,[13] 56[10]	U/L	Also called serum glutamic pyruvic transaminase (SGPT)
	Female	0.15[4]	0.75[4]	µkat/L
	Male	0.15[4]	1.1[4]
Aspartate transaminase (AST/ASAT[4])	Female	6[49]	34[49]	IU/L	Also called serum glutamic oxaloacetic transaminase (SGOT)
		0.25[4]	0.60[4]	µkat/L
	Male	8[49]	40[49]	IU/L
		0.25[4]	0.75[4]	µkat/L
Alkaline phosphatase (ALP)	Female	42[48]	98[48]	U/L
	Male	53[48]	128[48]
	(Enzyme activity)	0.6[4]	1.8[4]	µkat/L
Gamma glutamyl transferase (GGT)		5,[48] 8[10]	40,[48] 78[10]	U/L
	Women		0.63[50]	µkat/L
	Men		0.92[50]	µkat/L

Cardiac tests

Test	Patient type		Lower limit	Upper limit	Unit	Comments
Creatine kinase (CK)	male		24,[51] 38,[10] 60[48]	174,[18] 320[48]	U/L or ng/mL
			0.42[52]	1.5[52]	µkat/L
	female		24,[51] 38,[10] 96[18]	140,[18] 200[48]	U/L or ng/mL
			0.17[52]	1.17[52]	µkat/L
CK-MB			0	3,[10] 3.8,[4] 5[48]	ng/mL or μg/L[4]
Myoglobin	Female		1[53]	66[53]	ng/mL or µg/L
	Male		17[53]	106[53]

Brain natriuretic peptide (BNP)
Interpretation	Range / Cutoff
Congestive heart failure unlikely	< 100 pg/mL[54][55]
"Gray zone"	100-500 pg/mL[54][55]
Congestive heart failure likely	>500 pg/mL[54][55]

NT-proBNP
Interpretation	Age	Cutoff
Congestive heart failure likely	< 75years	> 125 pg/mL[56]
	>75 years	>450pg/mL[56]

Lipids

Test	Patient type	Lower limit	Upper limit	Unit	Therapeutic target
Triglycerides	10 – 39 years	54[18]	110[18]	mg/dL	< 100 mg/dL[57] or 1.1[57] mmol/L
		0.61[58]	1.2[58]	mmol/L
	40 – 59 years	70[18]	150[18]	mg/dL
		0.77[58]	1.7[58]	mmol/L
	> 60 years	80[18]	150[18]	mg/dL
		0.9[58]	1.7[58]	mmol/L
Total cholesterol		3.0,[59] 3.6[9][59]	5.0,[4][60] 6.5[9]	mmol/L	< 3.9[57]
		120,[10] 140[9]	200,[10] 250[9]	mg/dL	< 150[57]
HDL cholesterol	female	1.0,[61] 1.2,[4] 1.3[59]	2.2[61]	mmol/L	> 1.0[61] or 1.6[59]  mmol/L > 40[62] or 60[63] mg/dL
		40,[62] 50[64]	86[62]	mg/dL
HDL cholesterol	male	0.9[4][61]	2.0[61]	mmol/L
		35[62]	80[62]	mg/dL
LDL cholesterol (Not valid when triglycerides >5.0 mmol/L)		2.0,[61] 2.4[60]	3.0,[4][60] 3.4[61]	mmol/L	< 2.5[61]
		80,[62] 94[62]	120,[62] 130[62]	mg/dL	< 100[62]
LDL/HDL quotient		n/a	5[4]	(unitless)

Tumour markers

Test	Cutoff	Unit	Comments
Alpha fetoprotein (AFP)	44[10]	ng/mL or µg/L	Hepatocellular carcinoma or testicular cancer
Beta Human chorionic gonadotrophin (bHCG)	5[10]	IU/l or mU/ml	in male and non-pregnant female
CA19-9	40[10]	U/ml	Pancreatic cancer
CA-125	30,[65] 35[66]	kU/L or U/mL
Carcinoembryonic antigen (CEA) non-smokers at 50 years	3.4,[4] 3.6[67]	μg/l
Carcinoembryonic antigen (CEA) non-smokers at 70 years	4.1[67]	μg/l
Carcinoembryonic antigen (CEA) - smokers	5[68]	μg/l
Prostate specific antigen (PSA)	2.5,[4] 4[10]	μg/L[4][10] or ng/mL[18]	below age 45 <2.5 μg/L
PAP	3[18]	units/dL (Bodansky units)
Calcitonin	5,[69] 15[69]	ng/L or pg/mL	Cutoff against medullary thyroid cancer[69]

Endocrinology

Thyroid hormones

Test	Patient type	Lower limit	Upper limit	Unit
Thyroid stimulating hormone (TSH or thyrotropin)	Adults - standard range	0.3,[4] 0.4,[10] 0.5,[18] 0.6[70]	4.0,[4] 4.5,[10] 6.0[18]	mIU/L or μIU/mL
	Adults - optimal range	0.3,[71] 0.5[72]	2.0,[72] 3.0[71]	mIU/L or μIU/mL
	Infants	1.3[73]	19[73]	mIU/L or μIU/mL
Free thyroxine (FT4)	Normal adult	0.7,[74] 0.8[10]	1.4,[74] 1.5,[10] 1.8[75]	ng/dL
		9,[4][76] 10,[77] 12[78]	18,[4][76] 23[78]	pmol/L
	Child/Adolescent 31 d - 18 y	0.8[74]	2.0[74]	ng/dL
		10[76]	26[76]	pmol/L
	Pregnant	0.5[74]	1.0[74]	ng/dL
		6.5[76]	13[76]	pmol/L
Total thyroxine		4,[77] 5.5[10]	11,[77] 12.3[10]	μg/dL
		60[77][78]	140,[77] 160[78]	nmol/L
Free triiodothyronine (FT3)	Normal adult	0.2[77]	0.5[77]	ng/dL
		3.1[79]	7.7[79]	pmol/L
	Children 2-16 y	0.1[80]	0.6[80]	ng/dL
		1.5[79]	9.2[79]	pmol/L
Total triiodothyronine		60,[10] 75[77]	175,[77] 181[10]	ng/dL
		0.9,[4] 1.1[77]	2.5,[4] 2.7[77]	nmol/L
Thyroxine-binding globulin (TBG)		12[10]	30[10]	mg/L
Thyroglobulin (Tg)		1.5[77]	30[77]	pmol/L
		1[77]	20[77]	μg/L

Sex hormones

Levels of estradiol (the main estrogen), progesterone, luteinizing hormone and follicle-stimulating hormone during the menstrual cycle.

The diagrams at right take inter-cycle and inter-woman variability into account in displaying reference ranges for estradiol, progesterone, FSH and LH.

Test	Patient type	Lower limit	Upper limit	Unit
Dihydrotestosterone	adult male	30[81]	85[81]	ng/dL
Testosterone	Male, overall	8,[82] 10[83]	27,[82] 35[83]	nmol/L
		230,[84] 300[85]	780[84] - 1000[85]	ng/dL
	Male < 50 years	10[4]	45[4]	nmol/L
		290[84]	1300[84]	ng/dL
	Male > 50 years	6.2[4]	26[4]	nmol/L
		180[84]	740[84]	ng/dL
	Female	0.7[83]	2.8[83] - 3.0[4]	nmol/L
		20[85]	80[85] - 85[84]	ng/dL
17-Hydroxyprogesterone	male	0.06[18]	3.0[18]	mg/L
		0.18[86]	9.1[86]	µmol/l
	Female (Follicular phase)	0.2[18]	1.0[18]	mg/L
		0.6[86]	3.0[86]	µmol/l
Follicle-stimulating hormone (FSH)	Prepubertal	<1[87]	3[87]	IU/L
	Adult male	1[87]	8[87]
	Adult female (follicular and luteal phase)	1[87]	11[87]
	Adult female (Ovulation)	6[87] 95% PI (standard)	26[87] 95% PI)
		5[88] 90% PI (used in diagram)	15[88] (90% PI)
	Post-menopausal female	30[87]	118[87]
Luteinizing hormone (LH)	Female, peak	20[88] 90% PI (used in diagram)	75[88] (90% PI)	IU/L
	Female, post-menopausal	15[89]	60[89]
	Male aged 18+	2[90]	9[90]
Estradiol (an estrogen)	Adult male	50[91]	200[91]	pmol/L
		14[92]	55[92]	pg/mL
	Adult female (day 5 of follicular phase, and luteal phase)	70[91]	500,[91] 600[91]	pmol/L
		19[92]	140,[92] 160[92]	pg/mL
	Adult female - free (not protein bound)	0.5[93]	9[93]	pg/mL
		1.7[93]	33[93]	pmol/L
	Post-menopausal female	N/A[91]	< 130[91]	pmol/L
		N/A[92]	< 35[92]	pg/mL
Progesterone	Female in mid-luteal phase (day 21-23)	17,[88] 35[94]	92[94]	nmol/L
		6,[88] 11[95]	29[95]	ng/mL
Androstenedione	Adult male and female	60[89]	270[89]	ng/dL
	Post-menopausal female		< 180[89]
	Prepubertal		< 60[89]
Dehydroepiandrosterone sulfate	Adult male and female	30[96]	400[96]	µg/dL
SHBG	Adult female	40[97]	120[97]	nmol/L
	Adult male	20[97]	60[97]
Anti-Müllerian hormone (AMH)	13–45 years	0.7[98]	20[98]	ng/mL
		5[99]	140[99]	pmol/l

Other hormones

Test	Patient type	Lower limit	Upper limit	Unit
Adrenocorticotropic hormone (ACTH)		4.4[100]	18,[101] 22[100]	pmol/L
		20[10]	80,[102] 100[10]	pg/mL
Cortisol	09:00 am	140[103]	700[103]	nmol/L
		5[104]	25[104]	μg/dL
	Midnight	80[103]	350[103]	nmol/L
		2.9[104]	13[104]	μg/dL
Growth hormone (fasting)		0	5[9]	ng/mL
Growth hormone (arginine stimulation)		7[9]	n/a	ng/mL
IGF-1	Female, 20 yrs	110[105]	420[105]	ng/mL
	Female, 75 yrs	55[105]	220[105]
	Male, 20 yrs	160[105]	390[105]
	Male, 75 yrs	48[105]	200[105]
Prolactin	Female	71,[106] 105[106]	348,[106] 548[106]	mIU/L
		3.4,[106] 3.9[106]	16.4,[106] 20.3[106]	µg/L
	Male	58,[106] 89[106]	277,[106] 365[106]	mIU/L
		2.7,[106] 3.3[106]	13.0,[106] 13.5[106]	µg/L
Parathyroid hormone (PTH)		10,[107] 17[108]	65,[107] 70[108]	pg/mL
		1.1,[4] 1.8[109]	6.9,[4] 7.5[109]	pmol/L
25-hydroxycholecalciferol (a vitamin D) -Standard reference range		8,[18][110] 9[110]	40,[110] 80[18]	ng/mL
		20,[111] 23[112]	95,[112] 150[111]	nmol/L
25-hydroxycholecalciferol -Therapeutic target range		30,[113] 40[114]	65,[114] 100[113]	ng/mL
		85,[57] 100[114]	120,[57] 160[114]	nmol/L
Plasma renin activity		0.29,[115] 1.9[116]	3.7[115][116]	ng/(mL*hour)
		3.3,[117] 21[118]	41[117][118]	mcU/mL
Aldosterone	Adult		19,[117] 34.0[117]	ng/dL
			530,[119] 940[119]	pmol/L
Aldosterone-to-renin ratio	Adult		13.1,[120] 35.0[120]	ng/dl per ng/(mL·h)
			360,[120] 970[120]	pmol/liter per µg/(L·h)

Vitamins

Also including the vitamin B₁₂)-related amino acid homocysteine.

Test	Patient type	Standard range		Unit	Optimal range
		Lower limit	Upper limit		Lower limit	Upper limit
Vitamin A		30[18]	65[18]	µg/dL
Vitamin B9 (Folic acid/Folate) - Serum	Age > 1year	3.0[121]	16[121]	ng/mL or μg/L	5[122]
		6.8[123]	36[123]	nmol/l	11[123]
Vitamin B9 (Folic acid/Folate) - Red blood cells		200[121]	600[121]	ng/mL or μg/L
		450[123]	1400[123]	nmol/L
	Pregnant			ng/mL or μg/L	400[121]
				nmol/L	900[121]
Vitamin B12 (Cobalamin)		130,[124] 160[125]	700,[124] 950[125]	ng/L
		100,[126] 120[4]	520,[126] 700[4]	pmol/L
Homocysteine		3.3,[127] 5.9[127]	7.2,[127] 15.3[127]	μmol/L		6.3[57]
		45,[128] 80[128]	100,[128] 210[128]	μg/dL		85[57]
Vitamin C (Ascorbic acid)		0.4[18]	1.5[18]	mg/dL	0.9[57]
		23[129]	85[129]	μmol/L	50[57]
25-hydroxycholecalciferol (a vitamin D)		8,[18][110] 9[110]	40,[110] 80[18]	ng/mL	30,[113] 40[114]	65,[114] 100[113]
		20,[111] 23[112]	95,[112] 150[111]	nmol/L	85,[57] 100[114]	120,[57] 160[114]
Vitamin E				μmol/L	28[57]
				mg/dL	1.2[57]

Toxins

Test	Limit type	Limit	Unit
Lead	Optimal health range	< 20[13] or 40[18]	µg/dL
Blood ethanol content	Limit for drunk driving	0,[130] 0.2,[130] 0.8[130]	‰ or g/L
		17.4[131]	mmol/L

Hematology

Red blood cells

These values (except Hemoglobin in plasma) are for total blood and not only blood plasma.

Test	Patient	Lower limit	Upper limit	Unit	Comments
Hemoglobin (Hb)	male	2.0,[132] 2.1[9][133]	2.5,[132] 2.7[9][133]	mmol/L	Higher in neonates, lower in children.
		130,[4] 132,[10] 135[9]	162,[10] 170,[4] 175[9]	g/L
	female	1.8,[132] 1.9[9][133]	2.3,[132] 2.5[9][132][133]	mmol/L	Sex difference negligible until adulthood.
		120[4][9][10]	150,[4] 152,[10] 160[9][18]	g/L
Hemoglobin subunits (sometimes displayed simply as "Hemoglobin")	male	8.0,[134] 8.4[134]	10.0,[134] 10.8[134]	mmol/L	4 per hemoglobin molecule
	female	7.2,[134] 7.6[134]	9.2,[134] 10.0[134]
Hemoglobin in plasma		0.16[9]	0.62[9]	μmol/L	Normally diminutive compared with inside red blood cells
		1	4	mg/dL
Glycosylated hemoglobin (HbA1c)	< 50 years	3.6[4]	5.0[4]	% of Hb
	> 50 years	3.9[4]	5.3[4]
Haptoglobin	< 50 years	0.35[4]	1.9[4]	g/L
	> 50 years	0.47[4]	2.1[4]
Hematocrit (Hct)	male	0.39,[4] 0.4,[10] 0.41,[9] 0.45[18]	0.50,[4] 0.52,[10] 0.53,[9] 0.62[18]
	female	0.35,[4] 0.36,[9] 0.37[10][18]	0.46,[4][9][10] 0.48[18]
	Child	0.31[10]	0.43[10]
Mean cell volume (MCV)	Male	76,[18] 82[10]	100,[18] 102[10]	fL	Cells are larger in neonates, though smaller in other children.
	Female	78[10]	101[10]	fL
Red blood cell distribution width (RDW)		11.5[10]	14.5[10]	%
Mean cell hemoglobin (MCH)		0.39[9]	0.54[9]	fmol/cell
		25,[9] 27[4][18]	32,[18] 33,[4] 35[9]	pg/cell
Mean corpuscular hemoglobin concentration (MCHC)		31,[10] 32[4][18]	35,[10] 36[4][18]	g/dL or %[note 1]
		4.8,[135] 5.0[135]	5.4,[135] 5.6[135]	mmol/L
Erythrocytes/Red blood cells (RBC)	male	4.2,[18] 4.3[4][9][10]	5.7,[4] 5.9,[9] 6.2,[10] 6.9[18]	x10^12/L or mln/mm^3
	Female	3.5,[9] 3.8,[10] 3.9[4]	5.1,[4] 5.5[9][10]
	Infant/Child	3.8[10]	5.5[10]
Reticulocytes	Adult	26[4]	130[4]	x10^9/L
	Adult	0.5[9][10]	1.5[9][10]	% of RBC
	Newborn	1.1[10]	4.5[10]	% of RBC
	Infant	0.5[10]	3.1[10]	% of RBC

White blood cells

These values are for total blood and not only blood plasma.

Test	Patient type	Lower limit	Upper limit	Unit
White Blood Cell Count (WBC)	Adult	3.5,[4] 3.9,[136] 4.1,[10] 4.5[9]	9.0,[4] 10.0,[136] 10.9,[10] 11[9]	x10^9/L x10^3/mm^3 or x10^3/μL
	Newborn	9[137]	30[137]
	1 year old	6[137]	18[137]
Neutrophil granulocytes (A.K.A. grans, polys, PMNs, or segs)	Adult	1.3,[4] 1.8,[136] 2[137]	5.4,[4] 7,[136] 8[137]	x10^9/L
		45-54[9]	62,[9] 74	% of WBC
	Newborn	6[137]	26[137]	x10^9/L
Neutrophilic band forms	Adult		0.7[137]	x10^9/L
		3[9]	5[9]	% of WBC
Lymphocytes	Adult	0.7,[4] 1.0[136][137]	3.5,[136] 3.9,[4] 4.8[137]	x10^9/L
		16-25[9]	33,[9] 45	% of WBC
	Newborn	2[137]	11[137]	x10^9/L
Monocytes	Adult	0.1,[4] 0.2[138][139]	0.8[4][137][139]	x10^9/L
		3,[9] 4.0	7,[9] 10	% of WBC
	Newborn	0.4[137]	3.1[137]	x10^9/L
Mononuclear leukocytes (Lymphocytes + monocytes)	Adult	1.5	5	x10^9/L
		20	35	% of WBC
CD4^+ T cells	Adult	0.4,[10] 0.5[13]	1.5,[13] 1.8[10]	x10^9/L
Eosinophil granulocytes	Adult	0.0,[4] 0.04[139]	0.44,[139] 0.45,[137] 0.5[4]	x10^9/L
		1[9]	3,[9] 7	% of WBC
	Newborn	0.02[137]	0.85[137]	x10^9/L
Basophil granulocytes	Adult	40[136]	100,[4][139] 200,[137] 900[136]	x10^6/L
		0.0	0.75,[9] 2	% of WBC
	Newborn		0.64[137]	x10^9/L

Coagulation

Test	Lower limit	Upper limit	Unit	Comments
Thrombocyte/Platelet count (Plt)	140,[10] 150[4][9]	350,[4][18] 400,[9] 450[10]	x10^9/L or x1000/µL
Mean platelet volume (MPV)	7.2,[140] 7.4,[141] 7.5[142]	10.4,[141] 11.5,[142] 11.7[140]	fL
Prothrombin time (PT)	10,[13] 11,[9][143] 12[10]	13,[13] 13.5,[143] 14,[10] 15[9]	s	PT reference varies between laboratory kits - INR is standardised
INR	0.9[4]	1.2[4]		The INR is a corrected ratio of a patient's PT to normal
Activated partial thromboplastin time (APTT)	18,[10] 30[4][13]	28,[10] 42,[4] 45[13]	s
Thrombin clotting time (TCT)	11	18	s
Fibrinogen	1.7,[10] 2.0[4]	3.6,[4] 4.2[10]	g/L
Antithrombin	0.80[4]	1.2[4]	kIU/L
	0.15,[144] 0.17[145]	0.2,[144] 0.39[145]	mg/mL
Bleeding time	2	9	minutes
Viscosity	1.5[146]	1.72[146]	cP

Immunology

Acute phase proteins

Acute phase proteins are markers of inflammation.

Test	Patient	Lower limit	Upper limit	Unit	Comments
Erythrocyte sedimentation rate (ESR)	Male	0	Age÷2[147]	mm/h	ESR increases with age and tends to be higher in females.[148]
	Female		(Age+10)÷2[147]
C-reactive protein (CRP)			5,[4][149] 6[150]	mg/L
			200,[151] 240[151]	nmol/L
Alpha 1-antitrypsin (AAT)		20,[152] 22[153]	38,[153] 53[152]	μmol/L
		89,[154] 97[4]	170,[4] 230[154]	mg/dL
Procalcitonin			0.15[155]	ng/mL or μg/L

Isotypes of antibodies

Test	Patient	Lower limit	Upper limit	Unit	Comments
IgA	Adult	70,[4] 110[156]	360,[4] 560[156]	mg/dL
IgD		0.5[156]	3.0[156]
IgE		0.01[156]	0.04[156]
IgG		800[156]	1800[156]
IgM		54[156]	220[156]

Autoantibodies

Autoantibodies are usually absent or very low, so instead of being given in standard reference ranges, the values usually denote where they are said to be present, or whether the test is a positive test. There may also be an equivocal interval, where it is uncertain whether there is a significantly increased level. All included values^[157] are given for the ELISA test.

Test	Negative	Equivocal	Positive	Unit
anti-SS-A (Ro)	< 15[158]	15-25[158]	> 25[158]	Units per millilitre (U/mL)
anti-SS-B (La)	< 3[158]	3 – 4[158]	> 4[158]
Anti ds-DNA	< 40[158]	40 – 60[158]	> 60[158]
Anti ss-DNA	< 8[158]	8 - 10[158]	> 10[158]
Anti-histone antibodies	< 25[158]	n/a[158]	> 25[158]
Cytoplasmic/classical anti-neutrophil cytoplasmic antibodies (c-ANCA)	< 20[158]	21 - 30[158]	> 30[158]
Perinuclear anti-neutrophil cytoplasmic antibodies (p-ANCA)	< 5[158]	n/a	> 5[158]
Anti-mitochondrial antibodies (AMA)	< 10[158]	n/a[158]	> 10[158]
Rheumatoid factor (RF)	< 20	20 - 30	> 30[10]
Antistreptolysin O titre (ASOT) in preschoolers			> 100
ASOT at school age			> 250[10]
ASOT in adults			> 125[10]

Test	Negative	Low/weak positive	Moderate positive	High/strong positive	Unit
Anti-phospholipid IgG	< 20[158]	20 –30[158]	31 – 50[158]	> 51[158]	GPLU/ml[158]
Anti-phospholipid IgM	< 1.5[158]	1.5 –2.5[158]	2 – 9.9[158]	> 10[158]	MPL /ml[158]
Anti-phospholipid IgA	< 10[158]	10 -20[158]	21 – 30[158]	> 31[158]	arb U/ml[158]
Anti-citrullinated protein antibodies	< 20[158]	20 – 39[158]	40 - 59[158]	> 60[158]	EU[158]

Other immunology

Test	Lower limit	Upper limit	Unit
Serum free light chains (FLC): kappa/lambda ratio	0.26[159]	1.65[159]	(unit-less)

Other enzymes and proteins

Test	Lower limit	Upper limit	Unit	Comments
Lactate dehydrogenase (LDH)	50[18]	150[18]	U/L
	0.4[48]	1.7[48]	μmol/L
	1.8[4]	3.4[4]	µkat/L	< 70 years old[4]
Amylase	25,[9] 30,[10] 53[18]	110,[10] 120,[160] 123,[18] 125,[9] 190[48]	U/L
	0.15[4]	1.1[4]	µkat/L
	200[151]	240[151]	nmol/L
D-dimer	n/a	500[161]	ng/mL	Higher in pregnant women[162]
		0.5[4]	mg/L
Lipase	7,[10] 10,[18] 23[48]	60,[10] 150,[18] 208[48]	U/L
Angiotensin-converting enzyme (ACE)	23[48]	57[48]	U/L
Acid phosphatase		3.0[48]	ng/mL
Eosinophil cationic protein (ECP)	2.3[4]	16[4]	µg/L

Other electrolytes and metabolites

Electrolytes and Metabolites: For iron and copper, some related proteins are also included.

Test	Patient type	Lower limit	Upper limit	Unit	Comments
Osmolality		275,[9] 280,[18] 281[4]	295,[9] 296,[18] 297[4]	mOsm/kg	Plasma weight excludes solutes
Osmolarity		Slightly less than osmolality		mOsm/l	Plasma volume includes solutes
Urea		3.0[163]	7.0[163]	mmol/L	BUN - blood urea nitrogen
		7[9]	18,[9] 21[10]	mg/dL
* Uric acid[10]		0.18[9]	0.48[9]	mmol/L
	Female	2.0[18]	7.0[18]	mg/dL
	Male	2.1[18]	8.5[18]	mg/dL
Creatinine	male	60,[4] 68[164]	90,[4] 118[164]	μmol/L	May be complemented with creatinine clearance
		0.7,[165] 0.8[165]	1.0,[165] 1.3[165]	mg/dL
	female	50,[4] 68[164]	90,[4] 98[164]	μmol/L
		0.6,[165] 0.8[165]	1.0,[165] 1.1[165]	mg/dL
BUN/Creatinine Ratio		5[18]	35[18]	-
Plasma glucose (fasting)		3.8,[9] 4.0[4]	6.0,[4] 6.1[166]	mmol/L	See also glycosylated hemoglobin (in hematology)
		65,[10] 70,[9] 72[167]	100,[166] 110[18]	mg/dL
Full blood glucose (fasting)		3.3[4]	5.6[4]	mmol/L
		60[167]	100[167]	mg/dL
Lactate (Venous)		4.5[18]	19.8[18]	mg/dL
		0.5[168]	2.2[168]	mmol/L
Lactate (Arterial)		4.5[18]	14.4[18]	mg/dL
		0.5[168]	1.6[168]	mmol/L
Pyruvate		300[18]	900[18]	μg/dL
		34[169]	102[169]	μmol/L
Ketones			1[170]	mg/dL
			0.1[170]	mmol/L

Medication

Test	Lower limit	Upper limit	Unit	Comments
Digoxin	0.5[171]	2.0[171]	ng/ml	Narrow therapeutic window
	0.6[171]	2.6[171]	nmol/l
Lithium	0.4,[172] 0.5,[173][174] 0.8[175]	1.3[173][174]	mmol/l	Narrow therapeutic window
Paracetamol		30[176]	mg/L	Risk of paracetamol toxicity at higher levels
		200[176]	µmol/L

See also

• Blood test
• Cardiology diagnostic tests and procedures
• Comprehensive metabolic panel
• Medical technologist
• Reference range

Notes

1. The MCHC in g/dL and the mass fraction of hemoglobin in red blood cells in % are numerically identical in practice, assuming a RBC density of 1g/mL and negligible hemoglobin in plasma.

References

1. "Reference Ranges and What They Mean". Lab Tests Online (USA). Retrieved 22 June 2013.
2. Page 19 in: Stephen K. Bangert MA MB BChir MSc MBA FRCPath; William J. Marshall MA MSc PhD MBBS FRCP FRCPath FRCPEdin FIBiol; Marshall, William Leonard (2008). Clinical biochemistry: metabolic and clinical aspects. Philadelphia: Churchill Livingstone/Elsevier. ISBN 0-443-10186-8.
3. Page 34: Units of measurement in Medical toxicology By Richard C. Dart Edition: 3, illustrated Published by Lippincott Williams & Wilkins, 2004 ISBN 0-7817-2845-2, ISBN 978-0-7817-2845-4 1914 pages
4. Reference range list from Uppsala University Hospital ("Laborationslista"). Artnr 40284 Sj74a. Issued on April 22, 2008
5. Arterial versus venous reference ranges - Brief Article Medical Laboratory Observer, April, 2000 by D. Robert Dufour
6. Abbassi-Ghanavati, M.; Greer, L. G.; Cunningham, F. G. (2009). "Pregnancy and Laboratory Studies". Obstetrics & Gynecology 114 (6): 1326. doi:10.1097/AOG.0b013e3181c2bde8.
7. Armbruster, David; Miller (August 2007). "The Joint Committee for Traceability in Laboratory Medicine (JCTLM): A Global Approach to Promote the Standardisation of Clinical Laboratory Test Results". The Clinical Biochemist Reviews 28 (3): 105–114. PMC: 1994110. PMID 17909615.
8. PROOPIOMELANOCORTIN; NCBI --> POMC Retrieved on September 28, 2009
9. Last page of Deepak A. Rao; Le, Tao; Bhushan, Vikas (2007). First Aid for the USMLE Step 1 2008 (First Aid for the Usmle Step 1). McGraw-Hill Medical. ISBN 0-07-149868-0.
10. Normal Reference Range Table from The University of Texas Southwestern Medical Center at Dallas. Used in Interactive Case Study Companion to Pathologic basis of disease.
11. Derived from molar values using molar mass of 22.99 g•mol−1
12. Derived from molar values using molar mass of 39.10 g•mol−1
13. MERCK MANUALS > Common Medical Tests > Blood Tests Last full review/revision February 2003
14. Derived from molar values using molar mass of 35.45 g•mol−1
15. Larsson L, Ohman S (November 1978). "Serum ionized calcium and corrected total calcium in borderline hyperparathyroidism". Clin. Chem. 24 (11): 1962–5. PMID 709830.
16. Derived from molar values using molar mass of 40.08  g•mol−1
17. Derived from mass values using molar mass of 40.08  g•mol−1
18. Blood Test Results - Normal Ranges Bloodbook.Com
19. Slon S (2006-09-22). "Serum Iron". University of Illinois Medical Center. Retrieved 2006-07-06.
20. Diagnostic Chemicals Limited > Serum Iron-SL Assay July 15, 2005
21. Derived from mass values using molar mass of 55.85 g•mol−1
22. Table 1. Page 133" Clinical Chemistry 45, No. 1, 1999 (stating 1.9–3.3 g/L)
23. Derived by dividing mass values with molar mass
24. Ferritin by: Mark Levin, MD, Hematologist and Oncologist, Newark, NJ. Review provided by VeriMed Healthcare Network
25. Derived from mass values using molar mass of 450,000 g•mol−1
26. Mitchell ML, Filippone MD, Wozniak TF (August 2001). "Metastatic carcinomatous cirrhosis and hepatic hemosiderosis in a patient heterozygous for the H63D genotype". Arch. Pathol. Lab. Med. 125 (8): 1084–7. doi:10.1043/0003-9985(2001)125<1084:MCCAHH>2.0.CO;2. PMID 11473464.
27. Diaz J, Tornel PL, Martinez P (July 1995). "Reference intervals for blood ammonia in healthy subjects, determined by microdiffusion". Clin. Chem. 41 (7): 1048. PMID 7600690.
28. Derived from molar values using molar mass of 17.03 g/mol
29. Derived from mass values using molar mass of 63.55 g•mol−1
30. Reference range for copper at GPnotebook
31. Derived from mass using molar mass of 151kDa
32. Walter F., PhD. Boron (2005). Medical Physiology: A Cellular And Molecular Approaoch. Elsevier/Saunders. ISBN 1-4160-2328-3. Page 849
33. http://www.dlolab.com/PDFs/DLO-OCTOBER-2008-LAB-UPDATE.pdf
34. Derived from molar values using molar mass of 65.38 g/mol
35. Derived from mass values using molar mass of 65.38 g/mol
36. Derived from molar values using molar mass of 24.31 g/mol
37. Derived from mass values using molar mass of 24.31 g/mol
38. Middleton P, Kelly AM, Brown J, Robertson M (August 2006). "Agreements between arterial and central venous values for pH, bicarbonate, base excess, and lactate". Emerg Med J 23 (8): 622–4. doi:10.1136/emj.2006.035915. PMC: 2564165. PMID 16858095.
39. The Medical Education Division of the Brookside Associates--> ABG (Arterial Blood Gas) Retrieved on Dec 6, 2009
40. Derived from molar values using molar mass of 1.01 g•mol−1
41. Derived from mmHg values using 0.133322 kPa/mmHg
42. Derived from molar values using molar mass of 44.010 g/mol
43. Derived from molar values using molar mass of 61 g/mol
44. Reference range (albumin) at GPnotebook
45. Derived from mass using molecular weight of 65kD
46. Derived from mass values using molar mass of 585g/mol
47. Derived from molar values using molar mass of 585g/mol
48. Fachwörterbuch Kompakt Medizin E-D/D-E. Author: Fritz-Jürgen Nöhring. Edition 2. Publisher:Elsevier, Urban&FischerVerlag, 2004. ISBN 3-437-15120-7, ISBN 978-3-437-15120-0. Length: 1288 pages
49. GPnotebook > reference range (AST) Retrieved on Dec 7, 2009
50. "Gamma-GT". Leistungsverzeichnis. Medizinisch-Diagnostische Institute. Retrieved 20 November 2011.
51. Creatine kinase at GPnotebook
52. Page 585 in: Lee, Mary Ann (2009). Basic Skills in Interpreting Laboratory Data. Amer Soc of Health System. ISBN 1-58528-180-8.
53. Muscle Information and Courses from MediaLab, Inc. > Cardiac Biomarkers Retrieved on April 22, 2010
54. Brenden CK, Hollander JE, Guss D, et al. (May 2006). "Gray zone BNP levels in heart failure patients in the emergency department: results from the Rapid Emergency Department Heart Failure Outpatient Trial (REDHOT) multicenter study". American Heart Journal 151 (5): 1006–11. doi:10.1016/j.ahj.2005.10.017. PMID 16644322.
55. Strunk A, Bhalla V, Clopton P, et al. (January 2006). "Impact of the history of congestive heart failure on the utility of B-type natriuretic peptide in the emergency diagnosis of heart failure: results from the Breathing Not Properly Multinational Study". The American Journal of Medicine 119 (1): 69.e1–11. doi:10.1016/j.amjmed.2005.04.029. PMID 16431187.
56. Page 220 in: Lee, Mary Ann (2009). Basic Skills in Interpreting Laboratory Data. Amer Soc of Health System. ISBN 1-58528-180-8.
57. Adëeva Nutritionals Canada > Optimal blood test values Retrieved on July 9, 2009
58. Derived from values in mg/dl to mmol/l, by dividing by 89, according to faqs.org: What are mg/dl and mmol/l? How to convert? Glucose? Cholesterol? Last Update July 21, 2009. Retrieved on July 21, 2009
59. Derived from values in mg/dl to mmol/l, using molar mass of 386.65 g/mol
60. Reference range (cholesterol) at GPnotebook
61. Royal College of Pathologists of Australasia; Cholesterol (HDL and LDL) - plasma or serum Last Updated: Monday, 6 August 2007
62. Derived from values in mmol/l, using molar mass of 386.65 g/mol
63. What Your Cholesterol Levels Mean. American Heart Association. Retrieved on September 12, 2009
64. American Association for Clinical Chemistry; HDL Cholesterol
65. GP Notebook > range (reference, ca-125) Retrieved on Jan 5, 2009
66. ClinLab Navigator > Test Interpretations > CA-125 Retrieved on March 8, 2011
67. Bjerner J, Høgetveit A, Wold Akselberg K, et al. (June 2008). "Reference intervals for carcinoembryonic antigen (CEA), CA125, MUC1, Alfa-foeto-protein (AFP), neuron-specific enolase (NSE) and CA19.9 from the NORIP study". Scandinavian journal of clinical and laboratory investigation 68 (8): 1–12. doi:10.1080/00365510802126836. PMID 18609108.
68. Carcinoembryonic Antigen(CEA) at MedicineNet
69. Basuyau JP, Mallet E, Leroy M, Brunelle P (October 2004). "Reference intervals for serum calcitonin in men, women, and children". Clinical Chemistry 50 (10): 1828–30. doi:10.1373/clinchem.2003.026963. PMID 15388660.
70. The TSH Reference Range Wars: What's "Normal?", Who is Wrong, Who is Right... By Mary Shomon, About.com. Updated: June 19, 2006. About.com Health's Disease and Condition
71. 2006 Press releases: Thyroid Imbalance? Target Your Numbers Contacts: Bryan Campbell American] Association of Clinical Endocrinologists
72. The TSH Reference Range Wars: What's "Normal?", Who is Wrong, Who is Right... By Mary Shomon, About.com. Updated: June 19, 2006
73. Demers, Laurence M.; Carole A. Spencer (2002). "LMPG: Laboratory Support for the Diagnosis and Monitoring of Thyroid Disease". National Academy of Clinical Biochemistry (USA). Retrieved 2007-04-13. - see Section 2. Pre-analytic factors
74. Free T4; Thyroxine, Free; T4, Free UNC Health Care System
75. Derived from molar values using molar mass of 776.87 g/mol
76. Derived from mass values using molar mass of 776.87 g/mol
77. Table 4: Typical reference ranges for serum assays - Thyroid Disease Manager
78. van der Watt G, Haarburger D, Berman P (July 2008). "Euthyroid patient with elevated serum free thyroxine". Clinical Chemistry 54 (7): 1239–41. doi:10.1373/clinchem.2007.101428. PMID 18593963.
79. Derived from mass values using molar mass of 650.98 g/mol
80. Cioffi M, Gazzerro P, Vietri MT, et al. (2001). "Serum concentration of free T3, free T4 and TSH in healthy children". Journal of Pediatric Endocrinology & Metabolism 14 (9): 1635–9. doi:10.1515/jpem.2001.14.9.1635. PMID 11795654. INIST:13391788.
81. Life Extension Foundation > Blood Testing Protocols
82. Andrology Australia: Your Health > Low Testosterone > Diagnosis
83. Derived from mass values using molar mass of 288.42g/mol
84. Derived from molar values using molar mass of 288.42g/mol
85. MedlinePlus > Testosterone Update Date: 3/18/2008. Updated by: Elizabeth H. Holt, MD, PhD, Yale University. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director
86. Derived from mass values using molar mass of 330.46g/mol
87. reference range (FSH) GPnotebook. Retrieved on September 27, 2009
88. Values taken from day 1 after LH surge in: Stricker R, Eberhart R, Chevailler MC, Quinn FA, Bischof P, Stricker R (2006). "Establishment of detailed reference values for luteinizing hormone, follicle stimulating hormone, estradiol, and progesterone during different phases of the menstrual cycle on the Abbott ARCHITECT analyzer". Clinical Chemistry and Laboratory Medicine 44 (7): 883–7. doi:10.1515/CCLM.2006.160. PMID 16776638.
89. New York Hospital Queens > Services and Facilities > Patient Testing > Pathology > New York Hospital Queens Diagnostic Laboratories > Test Directory > Reference Ranges Retrieved on Nov 8, 2009
90. Mayo Medical Laboratories > Test ID: LH, Luteinizing Hormone (LH), Serum, retrieved December 2012
91. GPNotebook - reference range (oestradiol) Retrieved on September 27, 2009
92. Derived from molar values using molar mass of 272.38g/mol
93. Total amount multiplied by 0.022 according to 2.2% presented in: Wu CH, Motohashi T, Abdel-Rahman HA, Flickinger GL, Mikhail G (August 1976). "Free and protein-bound plasma estradiol-17 beta during the menstrual cycle". J. Clin. Endocrinol. Metab. 43 (2): 436–45. doi:10.1210/jcem-43-2-436. PMID 950372.
94. Derived from mass values using molar mass of 314.46 g/mol
95. Bhattacharya Sudhindra Mohan (July/August 2005) Mid-luteal phase plasma progesterone levels in spontaneous and clomiphene citrate induced conception cycles J Obstet Gynecol India Vol. 55, No. 4 : July/August 2005 Pg 350-352
96. Dehydroepiandrosterone Sulfate (DHEA-S), Serum at Mayo Foundation For Medical Education And Research. Retrieved July 2012
97. Unit Code 91215 at Mayo Clinic Medical Laboratories. Retrieved April 2011
98. Antimullerian Hormone (AMH), Serum from Mayo Medical Laboratories. Retrieved April 2012.
99. Derived from mass values using 140,000 g/mol, as given in:
    • Hampl R, Šnajderová M, Mardešić T (2011). "Antimüllerian hormone (AMH) not only a marker for prediction of ovarian reserve" (PDF). Physiological Research 60 (2): 217–23. PMID 21114374.
100. Derived from mass values using molar mass of 4540g/mol. This molar mass was taken from: PROOPIOMELANOCORTIN; NCBI --> POMC Retrieved on September 28, 2009
101. "Adrenocorticotropic Hormone:Normal". WebMD. 09-03-2006. Retrieved 2008-11-09. Check date values in: |date= (help)
102. Derived from molar values using molar mass of 4540g/mol. This molar mass was taken from: PROOPIOMELANOCORTIN; NCBI --> POMC Retrieved on September 28, 2009
103. Biochemistry Reference Ranges at Good Hope Hospital Retrieved on Nov 8, 2009
104. Derived from molar values using molar mass of 362 g/mol
105. Friedrich N, Alte D, Völzke H, et al. (June 2008). "Reference ranges of serum IGF-1 and IGFBP-3 levels in a general adult population: results of the Study of Health in Pomerania (SHIP)". Growth Hormone & IGF Research : Official Journal of the Growth Hormone Research Society and the International IGF Research Society 18 (3): 228–37. doi:10.1016/j.ghir.2007.09.005. PMID 17997337.
106. Taken from the assay method giving the lowest and highest estimate, respectively, from Table 2 in: Beltran L, Fahie-Wilson MN, McKenna TJ, Kavanagh L, Smith TP (October 2008). "Serum total prolactin and monomeric prolactin reference intervals determined by precipitation with polyethylene glycol: evaluation and validation on common immunoassay platforms". Clinical Chemistry 54 (10): 1673–81. doi:10.1373/clinchem.2008.105312. PMID 18719199.
107. Derived from molar values using molar mass of 9.4 kDa
108. Table 2 in: Aloia JF, Feuerman M, Yeh JK (2006). "Reference range for serum parathyroid hormone". Endocr Pract 12 (2): 137–44. doi:10.4158/ep.12.2.137. PMC: 1482827. PMID 16690460.
109. Derived from mass values using molar mass of 9.4 kDa
110. Derived from molar values using molar mass 400.6 g/mol
111. Bender, David A. (2003). "Vitamin D". Nutritional biochemistry of the vitamins. Cambridge: Cambridge University Press. ISBN 0-521-80388-8. Retrieved December 10, 2008 through Google Book Search.
112. Bischoff-Ferrari HA, Dietrich T, Orav EJ, et al. (September 2004). "Higher 25-hydroxyvitamin D concentrations are associated with better lower-extremity function in both active and inactive persons aged > or &#61;60 y". The American Journal of Clinical Nutrition 80 (3): 752–8. PMID 15321818.
113. Reusch J, Ackermann H, Badenhoop K (May 2009). "Cyclic changes of vitamin D and PTH are primarily regulated by solar radiation: 5-year analysis of a German (50 degrees N) population". Horm. Metab. Res. 41 (5): 402–7. doi:10.1055/s-0028-1128131. PMID 19241329.
114. Vasquez A, Cannell J (July 2005). "Calcium and vitamin D in preventing fractures: data are not sufficient to show inefficacy". BMJ 331 (7508): 108–9; author reply 109. doi:10.1136/bmj.331.7508.108-b. PMC: 558659. PMID 16002891.
115. Converted from values in mcU/mL by dividing with a factor of 11.2 mcU/mL per ng/(mL*hour), as given in:
     • New Assays for Aldosterone, Renin and Parathyroid Hormone University of
     Washington, Department of Laboratory Medicine. Retrieved Mars 2011
116. Pratt RE, Flynn JA, Hobart PM, Paul M, Dzau VJ (March 1988). "Different secretory pathways of renin from mouse cells transfected with the human renin gene". The Journal of Biological Chemistry 263 (7): 3137–41. PMID 2893797.
117. New Assays for Aldosterone, Renin and Parathyroid Hormone University of Washington, Department of Laboratory Medicine. Retrieved Mars 2011
118. Converted from values in ng/(mL*hour) by multiplying with a factor of 11.2 mcU/mL per ng/(mL*hour), as given in:
     • New Assays for Aldosterone, Renin and Parathyroid Hormone University of
     Washington, Department of Laboratory Medicine. Retrieved Mars 2011
119. Converted from mass values using molar mass of 360.44 g/mol
120. Tiu SC, Choi CH, Shek CC, et al. (January 2005). "The use of aldosterone-renin ratio as a diagnostic test for primary hyperaldosteronism and its test characteristics under different conditions of blood sampling". The Journal of Clinical Endocrinology and Metabolism 90 (1): 72–8. doi:10.1210/jc.2004-1149. PMID 15483077.
121. Central Manchester University Hospitals --> Reference ranges Retrieved on July 9, 2009
122. University of Kentucky Chandler Medical Center > Clinical Lab Reference Range Guide Retrieved on April 28, 2009
123. Derived from mass values using molar mass of 441 mol−1
124. GPnotebook > B12 Retrieved on April 28, 2009
125. Derived form molar values using molar mass of 1355g/mol
126. Derived from mass values using molar mass of 1355g/mol
127. The Doctor's Doctor: Homocysteine
128. Derived from molar values using molar massof 135 g/mol
129. Derived from mass values using molar mass of 176 grams per mol
130. For Driving under the influence by country, see Drunk driving law by country
131. Derived from mass values using molar mass of 46g/mol
132. Derived from mass values using 64,500 g/mol. This molar mass was taken from: Van Beekvelt MC, Colier WN, Wevers RA, Van Engelen BG (2001). "Performance of near-infrared spectroscopy in measuring local O2 consumption and blood flow in skeletal muscle". J Appl Physiol 90 (2): 511–519. PMID 11160049.
133. Normal Lab Values at Marshall University Joan C. Edwards School of Medicine. Retrieved July 2013
134. molar concentration as given for hemoglobin above, but multiplied by 4, according to: Lodemann P, Schorer G, Frey BM (February 2010). "Wrong molar hemoglobin reference values-a longstanding error that should be corrected". Annals of Hematology 89 (2): 209. doi:10.1007/s00277-009-0791-x. PMID 19609525.
135. Derived from mass concentration, using molar mass of 64,458 g/mol. This molar mass was taken from: Van Beekvelt MC, Colier WN, Wevers RA, Van Engelen BG (2001). "Performance of near-infrared spectroscopy in measuring local O2 consumption and blood flow in skeletal muscle". J Appl Physiol 90 (2): 511–519. PMID 11160049.. Subsequently, 1 g/dL = 0.1551 mmol/L
136. lymphomation.org > Tests & Imaging > Labs > Complete Blood Count Retrieved on May 14, 2009
137. Clinical Laboratory Medicine. By Kenneth D. McClatchey. Page 807.
138. Determination of monocyte count by hematological analyzers, manual method and flow cytometry in polish population Central European Journal of Immunology 1-2/2006. (Centr Eur J Immunol 2006; 31 (1-2): 1-5) authors: Elżbieta Górska, Urszula Demkow, Roman Pińkowski, Barbara Jakubczak, Dorota Matuszewicz, Jolanta Gawęda, Wioletta Rzeszotarska, Maria Wąsik,
139. gpnotebook.co.uk > blood constituents (reference range) Retrieved on May 14, 2009
140. Demirin H, Ozhan H, Ucgun T, Celer A, Bulur S, Cil H, Gunes C, Yildirim HA (2011). "Normal range of mean platelet volume in healthy subjects: Insight from a large epidemiologic study". Thromb. Res. 128 (4): 358–60. doi:10.1016/j.thromres.2011.05.007. PMID 21620440.
141. Normal Values: RBC, Hgb, Hct, Indices, RDW, Platelets, and MPV (Conventional Units) From labcareplus. Retrieved 4 nov, 2010
142. Lozano M, Narváez J, Faúndez A, Mazzara R, Cid J, Jou JM, Marín JL, Ordinas A (1998). "[Platelet count and mean platelet volume in the Spanish population]". Med Clin (Barc) (in Spanish) 110 (20): 774–7. PMID 9666418.
143. MedlinePlus Encyclopedia 003652
144. Antithrombin III at eMedicine
145. Antithrombin CO000300 in Coagulation Test Handbook at Massachusetts General Hospital. In turn citing:
     • Elizabeth M. Van Cott, M.D., and Michael Laposata, M.D., Ph.D., "Coagulation." In: Jacobs DS et al, ed. The Laboratory Test Handbook, 5th Edition. Lexi-Comp, Cleveland, 2001; 327-358.
146. Retrieved on November 20, 2009
147. Miller A, Green M, Robinson D (January 1983). "Simple rule for calculating normal erythrocyte sedimentation rate". British Medical Journal 286 (6361): 266. doi:10.1136/bmj.286.6361.266. PMC: 1546487. PMID 6402065.
148. Böttiger LE, Svedberg CA (1967). "Normal erythrocyte sedimentation rate and age". Br Med J 2 (5544): 85–7. doi:10.1136/bmj.2.5544.85. PMC: 1841240. PMID 6020854.
149. C-reactive protein at GPnotebook
150. 2730 Serum C-Reactive Protein values in Diabetics with Periodontal Disease A.R. Choudhury, and S. Rahman, Birdem, Diabetic Association of Bangladesh, Dhaka, Bangladesh. (the diabetics were not used to determine the reference ranges)
151. Derived from mass using molar mass of 25,106 g/mol
152. Sipahi T, Kara C, Tavil B, Inci A, Oksal A (March 2003). "Alpha-1 antitrypsin deficiency: an overlooked cause of late hemorrhagic disease of the newborn". Journal of Pediatric Hematology/oncology 25 (3): 274–5. doi:10.1097/00043426-200303000-00019. PMID 12621252.
153. Derived from mass values using molar mass of 44324.5 g/mol
154. Derived from molar values using molar mass of 44324.5 g/mol
155. "Procalcitonin, Serum". http://www.mayomedicallaboratories.com/. Mayo Clinic. Retrieved 2015-03-01. External link in |website= (help)
156. The Society for American Clinical Laboratory Science > Chemistry Tests > Immunoglobulins Retrieved on Nov 26, 2009
157. All values cited from Chronolab are given for ELISA
158. chronolab.com > Autoantibodies associated with rheumatic diseases > Reference ranges Retrieved on April 29, 2010
159. Rajkumar SV, Kyle RA, Therneau TM; et al. (August 2005). "Serum free light chain ratio is an independent risk factor for progression in monoclonal gammopathy of undetermined significance". Blood 106 (3): 812–7. doi:10.1182/blood-2005-03-1038. PMC: 1895159. PMID 15855274.
160. Reference range (amylase) at GPnotebook
161. Ageno W, Finazzi S, Steidl L, et al. (2002). "Plasma measurement of D-dimer levels for the early diagnosis of ischemic stroke subtypes". Archives of Internal Medicine 162 (22): 2589–93. doi:10.1001/archinte.162.22.2589. PMID 12456231.
162. Kline JA, Williams GW, Hernandez-Nino J (May 2005). "D-dimer concentrations in normal pregnancy: new diagnostic thresholds are needed". Clinical Chemistry 51 (5): 825–9. doi:10.1373/clinchem.2004.044883. PMID 15764641.
163. Gardner MD, Scott R (April 1980). "Age- and sex-related reference ranges for eight plasma constituents derived from randomly selected adults in a Scottish new town". Journal of Clinical Pathology 33 (4): 380–5. doi:10.1136/jcp.33.4.380. PMC: 1146084. PMID 7400337.
164. Finney H, Newman DJ, Price CP (January 2000). "Adult reference ranges for serum cystatin C, creatinine and predicted creatinine clearance". Annals of Clinical Biochemistry 37 (1): 49–59. doi:10.1258/0004563001901524. PMID 10672373.
165. Derived from molar values by multiplying with the molar mass of 113.118 g/mol, and divided by 10.000 to adapt from μg/L to mg/dL
166. MedlinePlus Encyclopedia Glucose tolerance test
167. Derived from molar values using molar mass of 180g/mol
168. Derived from mass values using molar mass of 90.08 g/mol
169. Derived from mass values using molar mass of 88.06 g/mol
170. Ketones at eMedicine
171. Page 700 in:
     Richard C. Dart. Medical Toxicology. Lippincott Williams & Wilkins=year=2004. ISBN 9780781728454.
172. The UK Electronic Medical Compendium recommends 0.4–0.8 mmol/l plasma lithium level in adults for prophylaxis of recurrent affective bipolar manic-depressive illness Camcolit 250 mg Lithium Carbonate Revision 2 December 2010, Retrieved 5 May 2011
173. Amdisen A. (1978). "Clinical and serum level monitoring in lithium therapy and lithium intoxication". J. Anal. Toxicol. 2: 193–202. doi:10.1093/jat/2.5.193.
174. R. Baselt, Disposition of Toxic Drugs and Chemicals in Man, 8th edition, Biomedical Publications, Foster City, CA, 2008, pp. 851–854.
175. One study (Solomon, D.; Ristow, W.; Keller, M.; Kane, J.; Gelenberg, A.; Rosenbaum, J.; Warshaw, M. (1996). "Serum lithium levels and psychosocial function in patients with bipolar I disorder". The American Journal of Psychiatry 153 (10): 1301–1307. PMID 8831438.) concluded a "low" dose of 0.4–0.6 mmol/L serum lithium treatment for patients with bipolar 1 disorder had less side effects, but a higher rate of relapse, than a "standard" dose of 0.8–1.0 mmol/l. However, a reanalysis of the same experimental data (Perlis, R.; Sachs, G.; Lafer, B.; Otto, M.; Faraone, S.; Kane, J.; Rosenbaum, J. (2002). "Effect of abrupt change from standard to low serum levels of lithium: A reanalysis of double-blind lithium maintenance data". The American Journal of Psychiatry 159 (7): 1155–1159. doi:10.1176/appi.ajp.159.7.1155. PMID 12091193.) concluded the higher rate of relapse for the "low" dose was due to abrupt changes in the lithium serum levels
176. John Marx, Ron Walls, Robert Hockberger (2013). Rosen's Emergency Medicine - Concepts and Clinical Practice. Elsevier Health Sciences. ISBN 9781455749874.

External links

• biochemical reference values at GPnotebook
• Descriptions at amarillomed.com
• Values at lymphomation.org