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Characteristics of the studies included in the systematic review (n = 24)
| Characteristic | Number (%) |
|---|---|
| Income Group | |
| • high-income countries | 16 (66.6) |
| • upper-middle income countries | 4 (16.7) |
| • low-income countries | 4 (16.7) |
| Study design | |
| • cross sectional studies | 24 (100%) |
| Study type | |
| • quantitative | 21 (87.5) |
| • qualitative | 1 (4.2) |
| • mixed methods | 2 (8.3) |
