Figure 1A Vitamin D status. Among 0–5, 6–11, and 12–18 year olds, the percentage of participants with either vitamin D insufficiency or deficiency was 56%, 69%, and 85%, respectively. B, Adjusted 25OHD levels. A mean adjusted 25OHD value was calculated for each age group controlling for patient ethnicity, visit season, sex, z-BMI, A1c, and diabetes duration. The 12–18 year olds had significantly lower 25OHD levels compared with 0–5 year olds (<0.01).