Diabetes Prevention for Mexican Americans

Inclusion Criteria: * no prior diabetes diagnosis (except gestational) * impaired fasting glucose (fasting glucose between 100 and 125 mg/dL) OR impaired glucose tolerance (between 140 and 199 mg/dL on a 2-hour post-load glucose tolerance test) OR A1C between 5.7% and 6.4%) * have not previously participated in diabetes self-management education studies * Mexican American Exclusion Criteria: * diagnosed with diabetes at baseline * fasting glucose greater than or equal to 126 mg/dL * ever used hypoglycemic medication (except during pregnancy) * are currently pregnant or within 3 months postpartum * are migrant farmworkers who migrate for more than 2 weeks * take medications that could confound a diabetes diagnosis (e.g., steroids) * have medical conditions for which changes in diet and/or physical activity would be contraindicated