Table 3.

JBI Critical Appraisal Checklist for studies reporting prevalence data.

	Guggenheimer et al., 2000 [20]	Saini et al., 2010 [21]	Bastos et al., 2011 [22]	Mohsin et al., 2014 [23]
(1) Was the sample representative of the target population?	Y	Y	Y	U
(2) Were study participants recruited in an appropriate way?	U	U	U	U
(3) Was the sample size adequate?	U	Y	U	Y
(4) Were the study subjects and setting described in detail?	U	U	U	U
(5) Is the data analysis conducted with sufficient coverage of the identified sample?	U	U	U	U
(6) Were objective, standard criteria used for measurement of the condition?	U	U	N	N
(7) Was the condition measured reliably?	U	U	U	U
(8) Was there appropriate statistical analysis?	Y	Y	Y	Y
(9) Are all the important confounding factors/subgroups/differences identified and accounted for?	N	N	N	N
(10) Were subpopulation identified using objective criteria?	U	Y	Y	U
Total number of “Y”	2	4	3	2
Quality assessment	low	low	low	low

Y: yes; N: no; U: unclear; N/A: not applicable.