RESEARCH DESIGN AND METHODS
Interventions DPP.
The DPP enrolled 3,234 participants with IGT and fasting hyperglycemia who were at least 25 years of age and had BMI of 24 kg/m2 or higher (22 kg/m2 in Asian Americans) (3). Enrollment began in July 1996 and ended in May 1999. Mean age was 51 years of age and mean BMI was 34.0 kg/m2 (3). Sixty-eight percent were women, and forty-five percent were members of minority groups (3).