Table 3:
Prevalence of COPD-changes over the years (%)
| Period | Males | Females |
|---|---|---|
| Up to 1970 | 4.2 | 2.7 |
| 1971–1990 | 5.7 | 2.6 |
| After 1990 | 4.9 | 2.7 |
| Average | 5.0 | 2.7 |
Source: Murthy and Sastry. NCMH Background papers-Burden of disease in India
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