Table 1.
Baseline characteristics of 39,831 patients from southern China
| Characteristic | Total | Adult | Children | p |
|---|---|---|---|---|
| Total (N) | 39,831 | 22,835 | 16,996 | – |
| Sex (male/female) | 18,345/21,360 | 8362/14,395 | 9983/6965 | < 0.001* |
| Age (mean ± SD) | 26 ± 21 | 41 ± 15 | 5 ± 4 | – |
| Season (N) | ||||
| Spring (3–5) | 8393 | 4667 | 3726 | < 0.001* |
| Summer (6–8) | 12,863 | 7288 | 5575 | |
| Autumn (9–11) | 10,351 | 6034 | 4317 | |
| Winter (12–2) | 8219 | 4844 | 3375 | |
| Disease (N) | ||||
| Rhinitis | 782 | 339 | 443 | < 0.001* |
| Asthma | 304 | 145 | 159 | |
| Urticaria | 4151 | 2635 | 1516 | |
| Eczema | 858 | 573 | 285 | |
| Atopic dermatitis | 3446 | 2078 | 1368 | |
| Positive for allergen (a/n, %) | ||||
| Mold | 590/18,317 (3.2) | 316/10,589 (3.0) | 274/7728 (3.5) | 0.034* |
| Blattella germanica | 4545/18,668 (24.3) | 3059/10,476 (29.2) | 1486/8192 (18.1) | < 0.001* |
| Dermatophagoides pteronyssinus | 6013/21,411 (28.1) | 3392/12,605 (27.3) | 2621/8806 (29.7) | 0.002* |
| Gallus domesticus | 1993/20,216 (9.9) | 194/11,343 (1.7) | 1799/8873 (20.3) | < 0.001* |
| Bos domesticus | 1953/20,416 (9.6) | 132/11,463 (1.2) | 1821/8953 (20.3) | < 0.001* |
| Arachis hypogaea | 209/4031 (5.2) | 95/1990(4.8) | 114/2041 (5.6) | 0.245 |
| Cancer pagurus | 3173/20,125 (15.8) | 2157/11,664 (18.5) | 1016/8461 (12.0) | < 0.001* |
| Penaeus monodon | 3879/20,228 (19.2) | 2645/11,500 (23.0) | 1234/8728 (14.1) | < 0.001* |
| Canis familiaris | 679/20,158 (3.4) | 385/11,491 (3.4) | 294/8667 (3.4) | 0.871 |
n test number, a positive number
* Chi square tests, p < 0.05. Mold (Mold mix 1: Penicillium chrysogenum, Cladosporium herbarum, Aspergillus fumigates and Alternaria alternata)