A comparative study of the interrelationships of age and the body mass index (BMI) with several risk factors for non‐insulin‐dependent diabetes mellitus (NIDDM) in adult White European (hereafter called European n = 262) and migrant Indian (n = 39) and Pakistani (n = 100) males residing in Peterborough, East Anglia, revealed significantly lower mean total cholesterol (TC), but higher mean diastolic blood pressure (DBP) in Asian men. Similar associations between age and fasting blood glucose (FBG), total cholesterol (TC), systolic (SBP), and diastolic (DBP) blood pressure were observed in Asian and European men, but TC, SBP and DBP differed between the ethnic groups. The BMI showed a significant relationship (after removal of the age effect) with SBP and DBP in all ethnic groups, but there was no significant ethnic group heterogeneity in the associations of BMI with FBG, TC, SBP and DBP. The distributions (age and BMI controlled) of TC, SBP and DBP were significantly different in Asians compared with Europeans. Am. J. Hum. Biol. 9:291–296, 1997. © 1997 Wiley‐Liss, Inc.