Adjusted relative risk for incident microalbuminuria by gender-specific quartile of waist circumference. Risk is presented relative to that of women in the category of smallest waist circumference (reference group), adjusted for age, race, duration of diabetes, treatment group, smoking status, glycosylated hemoglobin, and albumin excretion rate, each measured at DCCT closeout. Gender-specific waist quartiles are plotted at the mean waist circumference for each group.