Table 1 Prevalence of COPD GOLD I and II in some epidemiological studies of COPD
From: What have we learned from observational studies and clinical trials of mild to moderate COPD?
Study | Country | Prevalence (%) | |
|---|---|---|---|
GOLD I | GOLD II | ||
Halbert et al. [13] | Worldwide | All 7.6 (6.0–9.5) | |
 9.8 (5.9–15.8) | 5.5 (3.3–9.0) | ||
Buist AS, et al. (BOLD) [6] | Guangzhou |  5.9% | 7.6% |
Salzburg |  16.3% | 9.3% | |
Cape town |  6.5% | 14.2% | |
Reykjavik |  9.7% | 6.7% | |
Krakow |  14.4% | 10.3% | |
Manila |  0.9% | 11.3% | |
Menezes AM, et al. (PLATINO) [15] | Sao Paulo |  10.1% | 4.6% |
Santiago |  11% | 4.9% | |
Mexico City |  5.2% | 1.9% | |
Montevideo |  12.5% | 6.4% | |
Caracas |  6.4% | 4.9% | |
Miravitlles M et al. (EPISCAN) [18] | Spain | All 10.2% | |
 5.7% | 3.9% | ||