Table 2.

Within-person analysis of the relationship between vitamin D levels and renal activity adjusting for prednisone use, plaquenil use, and implicitly for all time-invariant characteristics

Vitamin D LevelOdds RatioP-value
10 ng/mL or more lower than personal average1.5 (1.3, 1.8)<0.0001
Within 10 ng/mL of the personal average1.0 (Ref Grp)
10 ng/mL or more higher than personal average0.8 (0.7, 1.0)0.080