Characteristics of included studies
| Variable | Detail | Number of interventions | % of interventions |
| Study design | Qualitative | 3 | 19 |
| Mixed methods | 2 | 13 | |
| Quantitative - cross-sectional survey | 2 | 13 | |
| Quantitative - case-control | 1 | 6 | |
| Quasi-experimental | 3 | 19 | |
| Quantitative - other | 5 | 31 | |
| Risk of bias | Low risk of bias | 5 | 31 |
| Moderate risk of bias | 2 | 13 | |
| High risk of bias | 9 | 56 | |
| Income classification | Low income | 2 | 13 |
| Lower-middle income | 3 | 19 | |
| Upper-middle income | 11 | 69 | |
| Location | Rural | 1 | 6 |
| Urban | 8 | 50 | |
| Mixed | 7 | 44 |