| Authors | Year | Country | Study type | Reference number |
| Bengo et al. | 2010 | Malawi | Quantitative, cross-sectional | [30] |
| Carrasco et al. | 2019 | Various African | Systematic review | [23] |
| Jiang et al. | 2015 | China | Quantitative, cross-sectional | [38] |
| Kebaabetswe et al. | 2003 | Botswana | Quantitative, cross-sectional | [31] |
| Keetile & Buwelo | 2016 | Botswana | Quantitative, cross-sectional | [32] |
| Lagarde et al. | 2003 | S. Africa | Quantitative, cross-sectional | [33] |
| Mavhu et al. | 2011 | Zimbabwe | Quantitative, cross-sectional | [35] |
| Mndzebel & Tegegn | 2014 | Botswana | Quantitative, cross-sectional | [36] |
| Walcott et al. | 2013 | Jamaica | Quantitative, cross-sectional | [34] |
| Westercamp & Bailey | 2007 | Various African | Systematic review | [24] |
| Yan et al. | 2015 | China | Quantitative, cross-sectional | [28] |
| Zamawe & Kusamula | 2015 | Malawi | Mixed methods | [37] |