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Table 2 Scoring criteria for quality appraisal

From: Women’s experiences of pharmacological and non-pharmacological pain relief methods for labour and childbirth: a qualitative systematic review

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.