Table 1 Patients’ characteristics of the study cohorts
From: Effects of particulate matter (PM) on childhood asthma exacerbation and control in Xiamen, China
| Â | Â | Number | Percentage |
|---|---|---|---|
Gender | Male | 2110 | 67.90 |
Female | 996 | 32.10 | |
Age(years) | 0–3 | 1230 | 39.60 |
4–6 | 1238 | 39.90 | |
7–14 | 638 | 20.50 | |
Total | 3106 | 100 | |
Return visit | |||
Gender | Male | 2292 | 66.60 |
Female | 1151 | 33.40 | |
Age(years) | 0–3 | 1127 | 32.70 |
4–6 | 1542 | 44.80 | |
7–14 | 774 | 22.50 | |
Total | 3443 | 100 | |