*2.3. Risk of Bias Assessment*

Studies were evaluated for methodological quality according to the COnsensus based standards for the selection of health status measurement instruments (COSMIN) checklist by two separate reviewers (SC and HC) (Table 1). This review used the recommended "worst score counts" method to obtain a total score for study quality. This was done by obtaining a quality score per measurement by taking the lowest rating of any item in a criteria box [49]. Each COSMIN item for all categories were scored from 4–1, where 4 was low risk and 1 was high risk. Each study needed a mean score of ≥ 3 to be included in this review [49].
