Australian paradox

The Australian Paradox is a term coined in 2011 to describe what its proponents claim are diverging trends in sugar consumption and obesity rates in Australia. The term was first used in a 2011 study published in Nutrients by Jennie Brand-Miller, in which she and co-author Alan Barclay reported that, in Australia, "a substantial decline in refined sugars intake [occurred] over the same timeframe that obesity has increased."[1] The "paradox" in its name refers to the fact that sugar consumption is often considered (for example by Robert Lustig) to be a significant contributor to rising obesity rates,[2] and because ecological studies in the United States have found a positive relationship between sugar consumption and obesity prevalence.[1]

Reaction

Despite the Brand-Miller study, statistics suggest that consumption of sugary food and beverages has increased in the country since 1994. The easy availability of fast food like McDonald's plays a significant role in this.

Some other researchers have criticized Brand-Miller's 2011 study, such as Rory Robertson, who argued that "[Brand-Miller's study's] regular claim – "In Australia sugar consumption has dropped 23 per cent since 1980" – is woefully misleading, based as it is on a series that was abandoned by the Australian Bureau of Statistics (ABS) as unreliable a decade ago."[3] Robertson has also argued that while the paper claims that consumption of sugary soft drinks in Australia declined by 10% between 1994 and 2006, it actually increased by 30%. He cites these and other data to support calling the research "a menace to public health".[4] In February 2014, the Australian Broadcasting Corporation (ABC) aired a program criticizing the 2011 study proposing the existence of the paradox, based in part on Robertson's research. The CEO of the Australian Beverages Council, Geoff Parker, has responded that his industry cites other studies besides Brand-Miller's 2011 study to support their view that sugar is not uniquely linked to obesity.[5] In response to Robertson's allegations, Sydney University, Brand-Miller's employer, launched an investigation to determine if she is guilty of research misconduct. A spokesperson for the university said there were "...no substantiated claims against the work of any academic at the university, nor indeed has there been any finding that the complaints warrant any further investigation".[5] In July 2014, Brand-Miller and Barclay were cleared of misconduct by a six-month investigation conducted by Robert Clark of the University of New South Wales.[6] Following an investigation prompted by the Australian economist, two minor arithmetical errors were identified in the original manuscript of The Australian Paradox which were promptly corrected. This was the only allegation out of 8 others that was substantiated.[7]

Another study on the same topic was published in 2013 by researchers from the University of Western Australia. The study concluded that "The Australian Paradox assertion is based on incomplete data, as it excludes sugar contained in imported processed foods, which have increased markedly."[8] The study argued that the claim that sugar consumption had been declining in Australia relied only on production data, and that Australia gets back much of the raw sugar it exports in the form of processed foods.[9] Similarly, a review published the following year argued that the claim of the existence of an Australian paradox "is flawed as it assumes declining sugar intake, without taking into account imported foods containing sugar."[10] Brand-Miller and Barclay have responded that this is wrong and that, in fact, the sugar consumption data they used (compiled by the United Nations Food and Agricultural Organisation, the Australian Bureau of Statistics and Australian beverage industry) "all incorporated data on imported products".[11] Recent research by Levy and Shrapnel ("Quenching Australia's thirst: A trend analysis of water-based beverage sales from 1997 to 2011") has concluded that added sugar from soft drinks has continued to decline.[12]

Also controversial is that while Brand-Miller's study stated that per capita sales of sugar-sweetened beverages had decreased by 10%, in an interview with ABC Radio in 2014, Brand-Miller said, "it might be that a key word came out. It's possible that this should be, 'While nutritively sweetened beverages ... 10 per cent sweetened beverages decreased by 10 per cent.' So I'll double-check it." Barclay, the 2011 study's other author, also said, in an email to the program, that "the 10 per cent decline could not possibly refer to per capita sales of nutritively sweetened soft drinks".[13] Also in 2014, Brand-Miller and Barclay published a correction to their original 2011 study.[14] According to Esther Han, this correction invalidates the study's claim that soft drink consumption decreased from 1994 to 2006.[15]

Complaints about the scientific journal Nutrients over its publication of The Australian Paradox paper led to the Open Access Scholarly Publishers Association (OASPA) investigating Nutrients publisher, MDPI. In 2014, OASPA's investigation concluded that MDPI continued to meet its membership criteria.[16]

References

  1. ↑ 1.0 1.1 Barclay AW, Brand-Miller J (April 2011). "The Australian paradox: a substantial decline in sugars intake over the same timeframe that overweight and obesity have increased". Nutrients 3 (4): 491–504. doi:10.3390/nu3040491. PMC 3257688. PMID 22254107.
  2. ↑ Russell, Geoff (26 October 2011). "Australian paradox". New Scientist. Retrieved 8 April 2014.
  3. ↑ Pascoe, Michael (7 March 2012). "Economist v nutritionists: big sugar and low-GI brigade lose". Sydney Morning-Herald. Retrieved 8 April 2014.
  4. ↑ "Is sugar innocent?". Australian Broadcasting Corporation. 9 February 2014. Retrieved 8 April 2014.
  5. ↑ 5.0 5.1 Safi, Michael (10 February 2014). "Soft-drink industry resists sugar consumption evidence in documentary". The Guardian. Retrieved 8 April 2014.
  6. ↑ Safi, Michael (20 July 2014). "Researchers cleared of misconduct in row over sugar link to obesity". The Guardian. Retrieved 24 July 2014.
  7. ↑ Outcome of inquiry into 'Australian Paradox' research
  8. ↑ Rikkers W, Lawrence D, Hafekost K, Mitrou F, Zubrick SR (2013). "Trends in sugar supply and consumption in Australia: is there an Australian Paradox?". BMC Public Health 13: 668. doi:10.1186/1471-2458-13-668. PMC 3726354. PMID 23866719.
  9. ↑ O'Connor, Anahad (25 July 2013). "Australians Are Getting Fatter". New York Times. Retrieved 8 April 2014.
  10. ↑ Kearney, Frances M; Fagan, Xavier J; Al-Qureshi, Salmaan (April 2014). "Review of the role of refined dietary sugars (fructose and glucose) in the genesis of retinal disease". Clinical & Experimental Ophthalmology: n/a–n/a. doi:10.1111/ceo.12290.
  11. ↑ Barclay AW, Brand-Miller JC (2013). "Trends in added sugar supply and consumption in Australia: there is an Australian Paradox". BMC Public Health 13: 898. doi:10.1186/1471-2458-13-898. PMC 3853158. PMID 24079329.
  12. ↑ Quenching Australia's thirst: A trend analysis of water-based beverage sales from 1997 to 2011
  13. ↑ Rollins, Adrian (4 March 2014). "Attack on controversial sugar study intensifies". Australian Medical Association. Retrieved 8 April 2014.
  14. ↑ Barclay, Alan; Brand-Miller, Jennie (12 February 2014). "Barclay, A.W. and Brand-Miller, J. The Australian Paradox: A Substantial Decline in Sugars Intake over the Same Timeframe that Overweight and Obesity Have Increased. Nutrients 2011, 3, 491-504". Nutrients 6 (2): 663–664. doi:10.3390/nu6020663.
  15. ↑ Han, Esther (17 February 2014). "Rise in sugary drinks is really a fall, says study funded by Beverages Australia". Sydney Morning-Herald. Retrieved 10 April 2014.
  16. ↑ Conclusions from OASPA Membership Committee Investigation into MDPI
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