Table 3.

Critical appraisal using Joanna Briggs Institute (JBI) tool for prevalence studies

	Agarwal, 2016[61]	Arnell, 2008[48]	Aydogdu, 2007[49]	Bull, 2018[58]	Chen, 2018[63]	Dinler, 1999[54]	Emond, 1995[50]	Englert, 2007[38]	Erginel, 2018[64]
Was the sample frame appropriate to address the target population?	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Unclear
Were study participants sampled in an appropriate way?	Yes	Yes	Yes	Yes	Yes	Unclear	Yes	Unclear	Unclear
Was the sample size adequate?	NA	NA	NA	NA	NA	NA	NA	NA	NA
Were the study subjects and the setting described in detail?	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes
Were valid methods used for the identification of the condition?	Yes	Yes	Yes	Yes	Yes	Yes	Unclear	Unclear	Yes
Was the condition measured in a standard, reliable way for all participants?	Yes	Yes	Yes	Yes	Yes	Yes	Unclear	Unclear	Yes
Was there appropriate statistical analysis?	Yes	Yes	Yes	Yes	Yes	Yes	Yes	NA	Yes
Was the response rate adequate, and if not, was the low response rate managed appropriately?	NA	NA	NA	NA	NA	NA	NA	NA	NA