Table A9.

The methodological quality assessment results of cohort studies.

Study	Q1	Q2	Q3	Q4	Q5	Q6	Q7	Q8	Q9	Q10	Q11	Overall Appraisal
Sato et al., 2018 [47]	Y	Y	U	Y	Y	Y	Y	Y	Y	NA	Y	Include
Bowen et al., 2018 [48]	Y	Y	Y	Y	Y	U	Y	Y	Y	U	Y	Include

Y = Yes, N = No, U = Unclear, NA = Not applicable. JBI critical appraisal checklist for cohort studies: Q1 = Were the two groups similar and recruited from the same population? Q2 = Were the exposures measured similarly to assign people to both exposed and unexposed groups? Q3 = Was the exposure measured in a valid and reliable way? Q4 = Were confounding factors identified? Q5 = Were strategies to deal with confounding factors stated? Q6 = Were the groups/participants free of the outcome at the start of the study (or at the moment of exposure)? Q7 = Were the outcomes measured in a valid and reliable way? Q8 = Was the follow up time reported and sufficient to be long enough for outcomes to occur? Q9 = Was follow up complete, and if not, were the reasons to loss to follow up described and explored? Q10 = Were strategies to address incomplete follow up utilized? Q11 = Was appropriate statistical analysis used?