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Quality assessment of selected studies
| Quality criteria | Assessment | Score | Maximum score |
|---|---|---|---|
| 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 standard diagnostic criteria, other criteria or case definition, unclear, or not reported?) | Standard diagnostic criteria | 3 | 3 |
| Other criteria | 2 | ||
| unclear | 1 | ||
| Not-reported | 0 | ||
| Total (high (4–5), moderate (2–3), or low quality (0–1)) | 5 | ||
