Table 1 Basic characteristics of the systemic lupus erythematosus cohort and comparison cohort (N = 5731)
Variable | N (%) | P | |||
|---|---|---|---|---|---|
systemic lupus erythematosus cohort 521 (9.1) | comparison cohort 5210 (90.9) | ||||
Sex | > 0.999 | ||||
male | 59 | (11.3) | 590 | (11.3) | |
female | 462 | (88.7) | 4620 | (88.7) | |
Age group (years) | > 0.999 | ||||
20–39 | 281 | (53.9) | 2810 | (53.9) | |
40–59 | 169 | (32.5) | 1690 | (32.5) | |
> 60 | 71 | (13.6) | 710 | (13.6) | |
Mean age (standard deviation), years | 41.2 | (15.8) | 40.2 | (15.8) | 0.986 |
Median age (interquartile range), years | 38 | (28–52) | 38 | (28–52) | |
Socioeconomic status (n = 5724) | 0.009 | ||||
low | 266 | (51.5) | 3000 | (57.6) | |
middle | 139 | (26.9) | 1324 | (25.4) | |
high | 112 | (21.7) | 883 | (17.0) | |
Geographic region (n = 5558) | 0.766 | ||||
northern | 297 | (59.5) | 3119 | (61.7) | |
central | 93 | (18.6) | 859 | (17.0) | |
southern | 99 | (19.8) | 976 | (19.3) | |
eastern | 10 | (2.0) | 105 | (2.1) | |