Table 3.
Prevalence of COPD by regions in China
| Cases/total (n/N) | Prevalence of COPD (95% CI) | Men (n/N) | Prevalence of COPD in men (95% CI) | Women (n/N) | Prevalence of COPD in women (95% CI) | p value | |
|---|---|---|---|---|---|---|---|
| Southwest China | 1798/10 887 | 20·2% (14·7–25·8) | 1291/5464 | 28·3% (20·7–36·0) | 507/5423 | 12·1% (8·5–15·7) | <0·0001 |
| Northeast China | 1004/6980 | 15·6% (10·4–20·7) | 602/3254 | 18·7% (12·9–24·5) | 402/3726 | 12·5% (7·5–17·6) | 0·0001 |
| North China | 1223/9103 | 13·7% (7·2–20·2) | 861/4249 | 17·8% (10·5–25·2) | 362/4854 | 9·6% (4·2–15·1) | <0·0001 |
| Northwest China | 1135/7895 | 13·6% (9·5–17·6) | 812/4078 | 18·0% (13·1–23·0) | 323/3817 | 8·4% (5·6–11·3) | <0·0001 |
| East China | 2324/17 716 | 12·1% (10·4–13·9) | 1757/8828 | 17·9% (15·1–20·7) | 567/8888 | 6·4% (5·3–7·4) | <0·0001 |
| South China | 757/6303 | 11·0% (9·8–12·2) | 595/3277 | 15·9% (13·7–18·1) | 162/3026 | 5·7% (3·4–7·9) | <0·0001 |
| Central China | 893/7868 | 10·2% (8·2–12·2) | 717/3987 | 15·7% (12·7–18·7) | 176/3881 | 4·5% (2·9–6·1) | <0·0001 |
Regions of China are shown in the appendix (p 2). COPD=chronic obstructive pulmonary disease.