Table 1 Characteristics of the study population
From: IL13genetic polymorphisms, smoking, and eczema in women: a case-control study in Japan
| Â | n (%) or mean (SD) | ||
|---|---|---|---|
Variable | Cases (N = 188) | Controls (N = 1,082) | P value* |
Age, years | 30.7 (4.6) | 31.6 (4.2) | 0.006 |
Region of residence (%) | Â | Â | 0.50 |
   Fukuoka Prefecture | 112 (59.6) | 610 (56.4) |  |
   Other than Fukuoka Prefecture in Kyushu | 61 (32.5) | 357 (33.0) |  |
   Okinawa Prefecture | 15 (8.0) | 115 (10.6) |  |
Having one or more children (%) | 107 (56.9) | 669 (61.8) | 0.20 |
Having ever smoked (%) | 63 (33.5) | 336 (31.1) | 0.50 |
Education (%) | Â | Â | 0.77 |
   < 13 years | 44 (23.4) | 228 (21.1) |  |
   13-14 years | 62 (33.0) | 368 (34.0) |  |
   ≥ 15 years | 82 (43.6) | 486 (44.9) |  |