Serial vitamin D data (464 measurements among 119 patients)
| Characteristic | n (%) or mean (SD) |
|---|---|
| Number of serial vitamin D measurements per patient | 7.5 (4.0) |
| Time interval between serial vitamin D measurements (years) | 0.6 (0.7) |
| Number of serial vitamin D measurements <40 nmol/L | 67/464 (14.4%) |
| Number of time intervals over which there was a rise in *SLEDAI-2K ≥1 | 59/266 (22.2%) |
| Number of visits with *SLEDAI-2K >10 | 42/464 (9.1%) |
*Scores range from 0 to 105, with higher scores indicating more active disease.
SLEDAI-SK, Systemic Lupus Erythematosus Disease Activity Index 2000.