Table 1.

Quality assessment of individual studies including in the review, 2020.

Author (reference)	1	2	3	4	5	6	7	8	9	10	11
	Target group representative	Study population representative	Census or random	Low non-response bias	Primary data collection	Acceptable case definition	Appropriate instrument measurement	Same model of data collection were used	Proper calculation of prevalence	Total “yes”	Overall risk of bias
Li et al. 27	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	9	0
Potempa et al. 14	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	9	0
Han et al. 20	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	8	1
Sadeghi-Haddad-Zavareh et al. 16	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	9	0
Wang et al. 25	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	8	1
Pepys 18	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	9	0
Wang 10	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	8	1
Kermali et al. 6	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	8	1
Ali et al. 19	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	9	0
Pan et al. 22	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	9	0
Acar et al. 21	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	9	0
Velavana et al. 17	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	9	0
Stringer et al. 23	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	8	1
Zhou et al. 3	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	9	0
Statsenko et al. 24	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	8	1
Luo et al. 13	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	9	0
Cui et al. 26	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	8	1
Chen et al. 15	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	9	0
Kazemi et al. 28	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	9	0
Chen et al. 8	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	8	1