Baseline characteristics.

Data given as mean (standard deviation) unless stated. Comparison of South Asians and White Europeans is made using t-test for continuous variables and the chi square test for categorical. IGT: Impaired glucose tolerance, IFG: Impaired fasting glucose, hypertension defined as systolic > = 140 mmHg or diastolic > = 90 mmHg, dyslipidemia defined as total cholesterol > = 5.0 mmol/l, †Chi square test compares 4 BMI groups by ethnicity.