Compared with the WHO criterion, the ADA criterion gave a higher prevalence of diabetes in men (6.4 vs. 4.7%) but a lower prevalence in women (3.3 vs. 4.2%). In Afro-Caribbeans, the sex difference in diabetes prevalence was reversed. Women had significantly lower fasting glucose than men despite higher 2-h glucose levels. Alcohol intake was positively associated with fasting glucose in men and women but not with 2-h glucose levels.