Additional Table 3 Quality assessment based on CASP criteria

Study / Clear statement of research aims / Qualitative methodology appropriate / Research design appropriate to address the aims of the research / Recruitment strategy appropriate to the aims of the research / Data collected in a way that addressed the research issue / Relationship between researcher and participants been adequately considered / Ethical issues been taken into consideration / Data analysis sufficiently rigorous / Clear statement of findings
Andersson [29] / ü / ü / ü / ü / ü / ü / ü / X / ü
Berry [30] / ü / ü / ü / ü / ü / X / ü / ü / ü
Field-Richards [31] / ü / ü / ü / ü / ü / X / ü / ü / ü
Finn-Paradis [32] / ü / ü / ü / ü / ü / X / X / X / ü
Guirguis-Younger [1] / ü / ü / ü / ü / ü / ü / X / ü / ü
Harris [33] / ü / X / X / ü / X / X / X / X / ü
Jack [3] / ü / ü / ü / ü / ü / ü / X / ü / ü
Luijkx [5] / ü / ü / ü / ü / ü / X / X / X / ü
McKee [34] / ü / ü / ü / ü / ü / ü / ü / ü / ü
Sevigny [35] / ü / ü / ü / ü / ü / ü / ü / ü / ü
Watts [36] / ü / ü / ü / ü / ü / ü / ü / X / ü
Weeks [37] / ü / X / ü / ü / ü / ü / ü / ü / ü