Table 3.

Quality assessment of MIH associated factor/risk factor studies according to the JBI criteria.

Study	Group comparability	Matched cases/controls	Similar identification criteria	Reliable and valid exposure measurement	Similar measurements for Cases/controls	Confounding factors identification	Confounding factors management	Reliable and valid outcome assessment	Meaningful exposure period	Statistical analysis	Total # of yes
Ahmadi et al. (2012)40	Yes	No	Yes	Yes	Yes	No	No	Yes	UC	Yes	6
Allazzam et al. (2014)26	Yes	No	Yes	No	Yes	No	No	No	UC	Yes	4
Elzein et al. (2021)44	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	UC	Yes	8
Ghanim et al. (2013)45	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	UC	Yes	8
Kılınç et al. (2019)25	Yes	No	Yes	UC	Yes	No	No	No	UC	Yes	4
Koruyucu et al. (2018)8	Yes	No	Yes	No	Yes	Yes	Yes	Yes	UC	Yes	7
Sönmez et al. (2013)36	Yes	No	Yes	UC	Yes	Yes	Yes	Yes	UC	Yes	7

UC (Unclear).