Case-control studies Case-control studies Case-control studies Case-control studies Case-control studies Case-control studies Case-control studies Case-control studies Case-control studies Case-control studies Case-control studies Case-control studies
Study Study Selection Selection Selection Selection Comparability Outcome Outcome Outcome Total score (max:9)
Adequate case definition Case representativeness Control selection Control definition Comparability of cases and control Ascertainment of exposure Method of ascertainment Non-response rate
Naderi (2004) Naderi (2004) 4
Moraida (2011) Moraida (2011) 5
Sakar (2015) Sakar (2015) 5
Abd-Allah Rezk (2016) Abd-Allah Rezk (2016) 5
Sakar (2016) Sakar (2016) 6
Cohort studies Cohort studies Cohort studies Cohort studies Cohort studies Cohort studies Cohort studies Cohort studies Cohort studies Cohort studies Cohort studies Cohort studies
Study Study Selection Selection Selection Selection Comparability Outcome Outcome Outcome Total score (max:9)
Exposed cohort representativeness Non-exposed selection Ascertainment of exposure Outcome does not present at the start Comparability of cohort Ascertainment of outcome Sufficient follow-up length Adequacy of follow-up
Dikensoy (2008), Dikensoy (2009) Dikensoy (2008), Dikensoy (2009) 7
Alwasel (2010) Alwasel (2010) 7
Ziaee (2010) Ziaee (2010) 7
Alwasel (2011) Alwasel (2011) 7
Ozturk (2011) Ozturk (2011) 8
Awwad (2012) Awwad (2012) 7
Patherick (2014) Patherick (2014) 9
Savitri (2014) Savitri (2014) 9
Seckin (2014) Seckin (2014) 8
Karateke (2015) Karateke (2015) 8
Tith (2019) Tith (2019) 6
Bernier (2021) Bernier (2021) 7
Hossain (2021) Hossain (2021) 6