From: Association between PM2.5 and primary care visits due to asthma attack in Japan: relation to Beijing’s air pollution episode in January 2013
Age group (years)
Sex
Total
Male
Female
0–1
7
3
10
2–5
21
31
6–14
18
17
35
15–19
4
20–39
5
9
14
40–64
12
≥65
1
2
63
49
112