Characteristic | Insufficiency | Deficiency | ||
---|---|---|---|---|
OR (95% CI) | p | OR (95% CI) | p | |
Age, yrs | 0.99 (0.98 to 1.00) | 0.141 | 0.99 (0.98 to 1.00) | 0.140 |
Male sex | 0.95 (0.63 to 1.43) | 0.820 | 0.80 (0.56 to 1.13) | 0.207 |
Season | ||||
Winter | Referent | — | Referent | — |
Summer | 0.83 (0.63 to 1.10) | 0.187 | 0.83 (0.67 to 1.03) | 0.084 |
Fall | 0.89 (0.46 to 1.72) | 0.731 | 0.80 (0.40 to 1.64) | 0.548 |
Spring | 1.00 (0.75 to 1.33) | 0.998 | 1.28 (1.06 to 1.55) | 0.011 |
Caucasian race/ethnicity | 0.62 (0.46 to 0.84) | 0.002 | 0.41 (0.33 to 0.51) | < 0.001 |
Anti-CCP antibody positivity | 2.00 (1.63 to 2.45) | < 0.001 | 1.55 (1.18 to 2.05) | 0.002 |
Vitamin D supplementation | 0.54 (0.34 to 0.87) | 0.011 | 0.47 (0.35 to 0.62) | < 0.001 |
CRP, mg/l | — | — | 0.99 (0.99 to 1.00) | 0.008 |
Tender joint count (0–28) | — | — | 1.02 (1.01 to 1.04) | 0.001 |
Anti-CCP: anti-cyclic citrullinated peptide antibody; CRP: C-reactive protein.