Multivariate logistic regression showing factors associated with current or ever peripheral arthritis.
| Characteristics | Peripheral Arthritis, n = 2051 (%) | No Peripheral Arthritis, n = 1933 (%) | OR (95% CI)1 | p |
|---|---|---|---|---|
| Age ≥ 43 yrs | 1163 (56.7) | 787 (40.7) | 1.44 (1.24–1.67) | < 0.001 |
| Sex (female) | 821 (40.0) | 573 (29.6) | ||
| Socioeducational level (university) | 867 (42.3) | 816 (42.2) | ||
| South American | 249 (12.1) | 103 (5.3) | 1.97 (1.51–2.58) | < 0.001 |
| Obese (BMI ≥ 30) | 446 (21.7) | 317 (16.4) | ||
| HLA-B27–negative | 1100 (53.6) | 667 (34.5) | 1.29 (1.11–1.50) | 0.001 |
| Absence of chronic IBP | 545 (26.6) | 214 (11.1) | 1.89 (1.55–2.33) | < 0.001 |
| Peripheral enthesitis | 1021 (49.8) | 485 (25.1) | 2.48 (2.13–2.88) | < 0.001 |
| Dactylitis | 563 (27.5) | 55 (2.8) | 6.56 (4.90–8.84) | < 0.001 |
| Uveitis | 381 (18.6) | 388 (20.1) | ||
| Psoriasis | 545 (26.6) | 89 (4.6) | 4.20 (3.22–5.50) | < 0.001 |
| Family history of psoriasis | 390 (19.0) | 154 (8.0) | 1.44 (1.13–1.82) | 0.003 |
| IBD | 120 (5.9) | 88 (4.6) | ||
| Never smoking | 1191 (58.1) | 947 (49.0) | 1.41 (1.21–1.64) | < 0.001 |
| Never alcohol intake | 1046 (51.0) | 873 (45.2) | 1.36 (1.17–1.58) | < 0.001 |
Hosmer-Lemeshow test: chi-square = 10.575; p = 0.227.
↵1 OR (95% CI) for statistically significative variables that remain in the final model. Percentages indicate no. patients with the covariate from the total no. patients in each column. BMI: body mass index; IBD: inflammatory bowel disease; IBP: inflammatory back pain.