Figure 1.

A: Distribution of cystatin C-GFR measurements at baseline in men with (●, n = 210) and without (■, n = 127) diabetes of similar age (18–44 years). B: Distribution of cystatin C-GFR measurements at baseline in women with (●, n = 216) and without (■, n = 136) diabetes of similar age (18–44 years). Measurements of serum cystatin C concentrations in diabetic subjects and nondiabetic subjects were performed in the same laboratory and according to the same method, and the same formula was used to estimate cystatin C-GFR (see research design and methods).