Body mass index and diabetes in Asia: a cross-sectional pooled analysis of 900,000 individuals in the Asia cohort consortium

The occurrence of diabetes has greatly increased in low- and middle-income countries, particularly in Asia, as has the prevalence of overweight and obesity; in European-derived populations, overweight and obesity are established causes of diabetes. The shape of the association of overweight and obes...

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Published in:	PloS one 2011-06, Vol.6 (6), p.e19930
Main Authors:	Boffetta, Paolo, McLerran, Dale, Chen, Yu, Inoue, Manami, Sinha, Rashmi, He, Jiang, Gupta, Prakash Chandra, Tsugane, Shoichiro, Irie, Fujiko, Tamakoshi, Akiko, Gao, Yu-Tang, Shu, Xiao-Ou, Wang, Renwei, Tsuji, Ichiro, Kuriyama, Shinichi, Matsuo, Keitaro, Satoh, Hiroshi, Chen, Chien-Jen, Yuan, Jian-Min, Yoo, Keun-Young, Ahsan, Habibul, Pan, Wen-Harn, Gu, Dongfeng, Pednekar, Mangesh Suryakant, Sasazuki, Shizuka, Sairenchi, Toshimi, Yang, Gong, Xiang, Yong-Bing, Nagai, Masato, Tanaka, Hideo, Nishino, Yoshikazu, You, San-Lin, Koh, Woon-Puay, Park, Sue K, Shen, Chen-Yang, Thornquist, Mark, Kang, Daehee, Rolland, Betsy, Feng, Ziding, Zheng, Wei, Potter, John D
Format:	Article
Language:	eng
Subjects:	Adult Age Alcoholic beverages Analysis Attorneys Body mass Body Mass Index Body size Body weight Cohort Studies Confidence intervals Consortia Cross sections Cross-Sectional Studies Diabetes mellitus Diabetes Mellitus - epidemiology Diabetes Mellitus - physiopathology Drinking behavior Female Gender Geography Health risk assessment Health risks Humans Insulin resistance Male Medicine Middle Aged Obesity Odds Ratio Overweight Population studies Populations Prevalence Preventive medicine Regression analysis Regression models Risk analysis Risk factors Statistical analysis Subgroups Type 2 diabetes
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Summary:	The occurrence of diabetes has greatly increased in low- and middle-income countries, particularly in Asia, as has the prevalence of overweight and obesity; in European-derived populations, overweight and obesity are established causes of diabetes. The shape of the association of overweight and obesity with diabetes risk and its overall impact have not been adequately studied in Asia. A pooled cross-sectional analysis was conducted to evaluate the association between baseline body mass index (BMI, measured as weight in kg divided by the square of height in m) and self-reported diabetes status in over 900,000 individuals recruited in 18 cohorts from Bangladesh, China, India, Japan, Korea, Singapore and Taiwan. Logistic regression models were fitted to calculate cohort-specific odds ratios (OR) of diabetes for categories of increasing BMI, after adjustment for potential confounding factors. OR were pooled across cohorts using a random-effects meta-analysis. The sex- and age-adjusted prevalence of diabetes was 4.3% in the overall population, ranging from 0.5% to 8.2% across participating cohorts. Using the category 22.5-24.9 kg/m²) as reference, the OR for diabetes spanned from 0.58 (95% confidence interval [CI] 0.31, 0.76) for BMI lower than 15.0 kg/m² to 2.23 (95% CI 1.86, 2.67) for BMI higher than 34.9 kg/m². The positive association between BMI and diabetes prevalence was present in all cohorts and in all subgroups of the study population, although the association was stronger in individuals below age 50 at baseline (p-value of interaction
ISSN:	1932-6203 1932-6203