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Associations between weight change and biomarkers of cardiometabolic risk in South Asians: secondary analyses of the PODOSA trial

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Author(s)

P Welsh, G Cezard, J M Gill, S Wallia, A Douglas, A Sheikh, S H Wild, J Tuomilehto, J McKnight, G Murray, R Bhopal, M E Lean, N Sattar

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Abstract

BACKGROUND/OBJECTIVES: The association of weight changes with cardiometabolic biomarkers in South Asians has been sparsely studied.

SUBJECTS/METHODS: We measured cardiometabolic biomarkers at baseline and after 3 years in the Prevention of Diabetes and Obesity in South Asians Trial. We investigated the effect of a lifestyle intervention on biomarkers in the randomized groups. In addition, treating the population as a single cohort, we estimated the association between change in weight and change in biomarkers.

RESULTS: Complete data were available at baseline and after 3 years in 151 participants. At 3 years, there was an adjusted mean reduction of 1·44?kg (95% confidence interval (95% CI): 0.18-2.71) in weight and 1.59?cm (95% CI: 0.08-3.09) in waist circumference in the intervention arm as compared with the control arm. There was no clear evidence of difference between the intervention and control arms in change of mean value of any biomarker. As a single cohort, every 1?kg weight reduction during follow-up was associated with a reduction in triglycerides (-1.3%, P=0.048), alanine aminotransferase (-2.5%, P=0.032), gamma-glutamyl transferase (-2.2%, P=0.040), leptin (-6.5%, P<0.0001), insulin (-3.7%, P=0.0005), fasting glucose (-0.8%, P=0.0071), 2-h glucose (-2.3%, P=0.0002) and Homeostatic Model Assessment of insulin resistance (HOMA-IR: -4.5%, P=0.0002). There was no evidence of associations with other lipid measures, tissue plasminogen activator, markers of inflammation or blood pressure.

CONCLUSIONS: We demonstrate that modest weight decrease in SAs is associated with improvements in markers of total and ectopic fat as well as insulin resistance and glycaemia in South Asians at risk of diabetes. Future trials with more intensive weight change are needed to extend these findings.International Journal of Obesity advance online publication, 22 March 2016; doi:10.1038/ijo.2016.35.

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Original languageEnglish
Pages (from-to)1005-1011
JournalInternational Journal of Obesity
Volume40
Early online date22 Mar 2016
DOIs
Publication statusPublished - 1 Jun 2016

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