Multivariate logistic regression showing factors associated with current or ever peripheral enthesitis.
| Characteristics | Peripheral Enthesitis, n = 1506 (%) | No Peripheral Enthesitis, n = 2478 (%) | 1OR (95% CI) | p |
|---|---|---|---|---|
| Age ≥ 43 yrs | 805 (53.5) | 1145 (46.2) | ||
| Sex (female) | 582 (38.6) | 812 (32.8) | ||
| Socioeducational level (university) | 654 (43.4) | 1029 (41.5) | ||
| South American | 210 (13.9) | 142 (5.7) | 2.29 (1.81–2.90) | < 0.001 |
| Obese (BMI ≥ 30) | 331 (22.0) | 432 (17.4) | 1.22 (1.03–1.45) | 0.023 |
| HLA-B27–negative | 690 (45.8) | 1077 (43.5) | ||
| Absence of chronic IBP | 277 (18.4) | 482 (19.5) | 0.65 (0.54–0.78) | < 0.001 |
| Peripheral arthritis | 1168 (77.6) | 1211 (48.9) | 2.58 (2.23–3.00) | < 0.001 |
| Dactylitis | 378 (25.1) | 240 (9.7) | 2.33 (1.91–2.84) | < 0.001 |
| Uveitis | 348 (23.1) | 421 (17.0) | 1.50 (1.27–1.78) | < 0.001 |
| Psoriasis | 273 (18.1) | 361 (14.6) | 1.31 (1.07–1.61) | 0.010 |
| Family history of psoriasis | 255 (16.9) | 289 (11.7) | 1.25 (1.02–1.53) | 0.031 |
| IBD | 92 (6.1) | 116 (4.7) | ||
| Never smoking | 830 (55.1) | 1380 (52.8) | ||
| Never alcohol intake | 765 (50.8) | 1154 (46.6) |
Hosmer-Lemeshow test: chi-square = 9.166; p = 0.241.
↵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.