Dr. Priscilla White's classification of diabetes according to age of onset, duration, vascular disease, and need for insulin

Gestational Diabetes:

• Class A1 - any onset, any duration, no insulin
• Class A2 - any onset, any duration, insulin

Pregestational Diabetes (all require insulin):

• Class B - onset >20 yr, duration <10 yr
• Class C - onset 10-19 yrs or duration 10-19 yrs
• Class D - onset <10 yrs or duration >20 yrs, presence of vascular disease
• Class F - any onset/duration, nephropathy
• Class R - any onset/duration, retinopathy