Table 1.
Characteristics of the cases and healthy controls.
|
Psoriasis vulgaris (n = 1,571) |
Control (n = 1,571) |
P | |
|---|---|---|---|
| n (%) | n (%) | ||
| Age (mean ± SD) | 44.3 ± 12.8 | 44.3 ± 12.8 | 1.000 |
| Male | 951 (60.5) | 951 (60.5) | 1.000 |
| Education | |||
| Primary/middle school | 726 (46.2) | 32 (2.7) | <0.001 |
| High school | 362 (23.0) | 127 (8.1) | |
| College or above | 483 (30.7) | 1,402 (89.2) | |
| Income (¥)a | |||
| <50,000 | 562 (35.8) | 225 (14.3) | <0.001 |
| 50,000–109,999 | 933 (59.4) | 475 (30.2) | |
| 110,000–199,999 | 76 (4.8) | 522 (33.2) | |
| >200,000 | 0 (0.0) | 349 (22.2) | |
| Smoking | |||
| Current | 537 (34.2) | 238 (15.2) | <0.001 |
| No/Former | 1,034 (65.8) | 1,333 (84.8) | |
| Alcohol drinking | |||
| NO | 1,251 (76.2) | 1,197 (79.6) | 0.031 |
| Yes | 320 (23.8) | 374 (20.4) |
a
1 ¥ = US $0.15.