Table 1.
Characteristics of the asthma cases and controls.
| Characteristics | Non-Asthma (N = 3520) |
Asthma (N = 3520) |
p-Value |
|---|---|---|---|
| N (%) | |||
| Age | 1.0000 | ||
| 0–5 | 2531 (71.9) | 2531 (71.9) | |
| 6–18 | 989 (28.1) | 989 (28.1) | |
| Gender | 1.0000 | ||
| Male | 2007 (57.0) | 2007 (57.0) | |
| Female | 1513 (43.0) | 1513 (43.0) | |
| Greenness | 0.0367 | ||
| 0–20% | 855 (24.3) | 842 (23.9) | |
| 21–40% | 961 (27.3) | 1031 (29.3) | |
| 41–60% | 815 (23.2) | 745 (21.2) | |
| 61–80% | 555 (15.8) | 606 (17.2) | |
| 81–100% | 334 (9.5) | 296 (8.4) | |
| Urbanization | <0.0001 | ||
| 1 (Most urbanized) | 738 (21.0) | 1030 (29.3) | |
| 2 | 2359 (67.0) | 2228 (63.3) | |
| 3 | 346 (9.8) | 225 (6.4) | |
| 4 (Least urbanized) | 77 (2.2) | 37 (1.0) | |
| Frequency of visits to healthcare providers | <0.0001 | ||
| ≤15 times/year | 1558 (44.3) | 668 (19.0) | |
| 16–44 times/year | 1274 (36.2) | 1350 (38.4) | |
| 45–60 times/year | 502 (14.2) | 968 (27.5) | |
| >60 times/year | 186 (5.3) | 534 (15.1) | |
| Mean family income of townships | <0.0001 | ||
| <794,000 NTD | 1020 (29.0) | 772 (21.9) | |
| 794,000–862,000 NTD | 935 (26.6) | 802 (22.8) | |
| 862,000–989,000 NTD | 637 (18.1) | 774 (22.0) | |
| >989,000 NTD | 928 (26.4) | 1172 (33.3) | |
NTD, New Taiwan Dollar.