Table 2 Inclusion criteria for quantitative studies
Aspect | Criteria |
|---|---|
Sampling method |    - Methods must be clearly described |
   - Good method of data collection: | |
∘ High risk group: Sampling frame should be made prior the survey. | |
∘ Low risk group: household survey was weighted more than facility-based survey | |
Sample size | Representative (based on sample size calculation and estimated size of relevant population in a specific province). |
   - High risk group: sample included at least 20% of high risk population identified in mapping stage | |
   - Low risk group: sample included at least 200 people/province | |
Interview method | Face-to-face and computer based interviews were weighted more than self-administered interviews |
Response rate | > 95% |
Frequency of data type | If a study was the only one reporting on key data, it was considered to be included |