Association between vitamin D deficiency and increasing tertiles of disease activity and functional impairment, adjusted for age gender, season of testing and use of TNF inhibition
| Tertiles | n | Vitamin D deficiency | ||
|---|---|---|---|---|
| ORadj | 95% CI | |||
| BASDAI | 0–3.3 | 41 | reference | |
| 3.5–6.8 | 37 | 2.85 | 0.62, 13.08 | |
| 6.9–10 | 39 | 4.64 | 1.02, 21.17 | |
| Spinal Pain VAS | 0–3 | 45 | reference | |
| 4–7 | 35 | 3.03 | 0.64, 14.29 | |
| 8–10 | 37 | 8.19 | 1.65, 40.60 | |
| BASFI | 0–3.4 | 39 | reference | |
| 3.5–7.2 | 39 | 2.44 | 0.59, 10.07 | |
| 7.3–10 | 39 | 3.35 | 0.85, 15.55 | |