Table 1 Basic characteristics of the systemic lupus erythematosus cohort and comparison cohort (N = 3462)
Variable | n (%) | P value | |
|---|---|---|---|
systemic lupus erythematosus cohort 577 (16.7) | comparison cohort 2885 (83.3) | ||
Age, years, mean (SD) | 41.0 (14.7) | 40.5 (12.9) | 0.432 |
Obesity | 15 (2.6) | 40 (1.4) | 0.033 |
Fracture of the lower limb | 47 (8.1) | 127 (4.4) | < 0.001 |
Socioeconomic status (n = 3364) | 0.058 | ||
Low | 212 (37.7) | 914 (32.6) | |
Medium | 183 (32.6) | 960 (34.3) | |
High | 167 (29.7) | 928 (33.1) | |
Geographic region (n = 3361) | 0.646 | ||
Northern | 352 (64.2) | 1812 (64.4) | |
Central | 95 (17.3) | 434 (15.4) | |
Southern | 93 (16.9) | 511 (18.2) | |
Eastern | 9 (1.6) | 55 (2.0) | |