| Type 1 | Type 2 | |
|---|---|---|
| Body habitus | are usually not overweight and may have a history of weight loss. | are overweight with BMI > 85th percentile for age and gender |
| Age | present either between 4-6 years of age or 10-14 years of age | generally present after the onset of puberty |
| Insulin resistance | not seen | usually seen in type 2 and can be identified by the presence of acanthosis nigricans, hypertension, dyslipidemia, PCOS |
| Family history | sometimes positive | usually positive |
| Ethnicity | usually non-Hispanic black, Hispanic, Native American, or Asian American | |
| Ketoacidosis | more likely to present with ketoacidosis | may present this way |
| Autoantibodies | positive | Negative |