Multivariate logistic regression regarding the statistically significant covariates obtained in the univariate logistic regressions. Chi-square: 938.35 p < 0.001. P value compares patients with “low fatigue” against “high fatigue.”
| Variables | OR (95% CI) | p |
|---|---|---|
| Female, ref. male | 1.34 (1.03–1.74) | 0.031 |
| SF-12 question 6 | 1.83 (1.39–2.42) | < 0.001 |
| Vertebral pain in the last week, VAS, cm | 1.22 (1.15–1.29) | < 0.001 |
| Patient’s global VAS of disease activity, cm | 1.24 (1.16–1.33) | < 0.001 |
| ASQoL | 1.11 (1.08–1.14) | < 0.001 |
| Item 5 BASDAI | 1.26 (1.19–1.34) | < 0.001 |
| Item 6 BASDAI | 0.94 (0.88–0.99) | 0.026 |
ref.: reference; SF-12: Medical Outcomes Study Short Form-36; VAS: visual analog scale; ASQoL: ankylosing spondylitis quality of life; BASDAI: Bath Ankylosing Spondylitis Disease Activity Index.