Quality appraisal studies reporting qualitative data (CASP tool)
| First author and date (listed in chronological, then alphabetical order) | Was there a clear statement of aims? | Is a qualitative method appropriate? | Research design appropriate to research aims? | Recruitment strategy appropriate to research aims? | Data collected to address research issue? | Relationship between researcher and participants considered? | Have ethical issues been considered? | Was the data analysis sufficiently rigorous? | Clear statement of findings? | Quality rating: Poor≤3 Fair=4–5 Good≥6 |
| Foggin 200623 | Yes | Yes | Yes | Cannot tell | Yes | Cannot tell | Cannot tell | Cannot tell | No | Fair |
| Hemson 200726 | Yes | Yes | Yes | Cannot tell | Cannot tell | Cannot tell | Cannot tell | Cannot tell | Yes | Fair |
| Geere 2010 and 46 | Yes | Yes | Yes | Yes | Yes | Cannot tell | Yes | Cannot tell | Yes | Good |
| Domènech 201247 | Yes | Yes | Yes | Cannot tell | Yes | Cannot tell | Cannot tell | Cannot tell | Yes | Fair |
| Stevenson 201234 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good |
| Yallew, 201235 | Yes | Yes | Yes | Cannot tell | Yes | Cannot tell | Yes | Cannot tell | Yes | Good |
| Asaba 201331 | Yes | Yes | Yes | Yes | Cannot tell | Cannot tell | No | Cannot tell | No | Fair |
| Robson 201332 | Yes | Yes | Cannot tell | Cannot tell | Cannot tell | Cannot tell | No | Cannot tell | Yes | Poor |
| House 201448 | Yes | Yes | Cannot tell | Cannot tell | Cannot tell | Cannot tell | Cannot tell | Cannot tell | Yes | Poor |
| Isoke 201449 | Yes | Yes | Yes | Yes | Yes | Cannot tell | Cannot tell | Cannot tell | Yes | Good |
| Mukhulani 201450 | Yes | Yes | Yes | Cannot tell | Cannot tell | Cannot tell | Cannot tell | Cannot tell | Yes | Fair |
| Schatz 201451 | Yes | Yes | Yes | Yes | Yes | Cannot tell | Cannot tell | Yes | Yes | Good |
| Bisung 201552 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good |
| Sarkar 201553 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Cannot tell | Yes | Good |
| Subbaraman 201554 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Good |
| Ghosh 201655 | Yes | Yes | Yes | Yes | Yes | Cannot tell | Yes | Yes | Yes | Good |
| Mbereko 201656 | No | Yes | Cannot tell | Yes | Yes | Yes | Cannot tell | Yes | Yes | Good |
| Zolnikov 201657 | Yes | Yes | Yes | Yes | Yes | Cannot tell | Cannot tell | Yes | Yes | Good |
| Ayoade 201758 | Yes | Yes | Cannot tell | Cannot tell | Yes | Cannot tell | No | Cannot tell | No | Poor |
| Mercer 201759 | Yes | Yes | Yes | Yes | Yes | Cannot tell | Yes | Yes | Cannot tell | Good |
| Thomas 201844 | Yes | Yes | Cannot tell | Cannot tell | Cannot tell | Cannot tell | No | Cannot tell | Cannot tell | Poor |