Table 3 2019–2020 World Bank country income level classifications of the countries the included studies were conducted (N = 20)
High-income country | Upper-middle-income countries | Lower-middle-income countries | Low-income countries |
|---|---|---|---|
Seychelles | Botswana | Cameroon | Ethiopia |
| Â | Mauritius | Ghana | Mozambique |
| Â | South Africa | Kenya | Tanzania |
| Â | Â | Lesotho | Togo |
| Â | Â | Nigeria | Uganda |
| Â | Â | Sudan | Malawi |
| Â | Â | Zimbabwe | Benin |
| Â | Â | Mauritania | The Gambia |
Total = 1 | Total = 3 | Total = 8 | Total = 8 |