Quality assessment of included studies
| Study | Q1 | Q2 | Q3 | Q4 | Q5 | Q6 | Q7 | Q8 | Q9 | Q10 | Score |
| Haan et al 64 | Y | Y | N | Y | Y | Y | Y | Y | N | Y | 8 |
| Thenral and Annamalai38 | Y | Y | N | Y | Y | Y | Y | Y | N | Y | 8 |
| Bian et al 34 | Y | Y | N | Y | Y | U | Y | Y | Y | Y | 8 |
| Zhang et al 36 | Y | Y | N | Y | Y | U | Y | Y | Y | Y | 8 |
| Sangers et al 37 | Y | Y | N | Y | Y | Y | Y | Y | N | Y | 8 |
| McCradden et al 23 | Y | Y | N | Y | Y | U | Y | Y | Y | N | 8 |
| McCradden et al 26 | Y | Y | Y | Y | Y | U | Y | Y | N | Y | 8 |
| Topol43 | Y | Y | N | Y | Y | Y | Y | Y | N | Y | 8 |
| Nelson et al 35 | Y | Y | N | Y | Y | Y | Y | Y | N | Y | 8 |
| Richardson et al 32 | Y | Y | N | Y | Y | U | Y | Y | N | Y | 7 |
| Ding et al 40 | Y | Y | N | Y | Y | Y | Y | Y | N | Y | 8 |
| Müller et al 33 | Y | Y | N | Y | Y | U | Y | Y | N | Y | 7 |
Q1: Is there congruity between the research methodology and the research questions or objectives? Q2: Is there congruity between the research methodology and the representation and analysis of data? Q3: Is there a statement locating the researcher culturally or theoretically? Q4: Are participants and their voices adequately represented? Q5: Do the conclusions drawn from the research report flow from the analysis or interpretation of the data? Q6: Is there congruity between the stated philosophical perspective and the research methodology? Q7: Is there congruity between the research methodology and the data collection methods? Q8: Is there congruity between the research methodology and the interpretation of results? Q9: Is the influence of the researcher on the research, and vice versa, addressed? Q10: Is the research ethical according to current criteria or, for recent studies, and is there evidence of ethical approval by an appropriate body?.
N, no; U, unclear; Y, yes.