| Sampling method (was it representative of a target subnational population?) |
Yes |
1 |
1 |
| No |
0 |
| Appropriateness of statistical analysis |
Yes |
1 |
1 |
| No |
0 |
| Case ascertainment (was it based on spirometry, BMRC criteria, informal interviews, or not reported?) |
Spirometry |
3 |
3 |
| BMRC or doctor’s diagnosis |
2 |
| Informal interviews |
1 |
| Not-reported |
0 |
| Total (high (4-5), moderate (2-3), or low quality (0-1)) |
5 |