Table 2.

Scoring criteria for quality appraisal

A: No, or few flaws. The study credibility, transferability, dependability and confirmability are high; B: Some flaws, unlikely to affect the credibility, transferability, dependability and/or confirmability of the study; C: Some flaws that may affect the credibility, transferability, dependability and/or confirmability of the study. D: Significant flaws that are very likely to affect the credibility, transferability, dependability and/or confirmability of the study.