Meta-Analysis
Copyright ©The Author(s) 2019.
World J Clin Cases. Mar 6, 2019; 7(5): 585-599
Published online Mar 6, 2019. doi: 10.12998/wjcc.v7.i5.585
Table 2 Quality assessment of the included studies based on scores of Newcastle-Ottawa Scale (case-control study version and cohort version)
Ref.Case definition adequacyRepresentativeness of casesSelection of controlsDefinition of controlsComparability of cases and controlsAscertainment of exposureSame method of ascertainment for cases and controlsNon-response rateTotal quality score
Tsiotra et al[49], 20181001111NI5
Lobo et al[42], 2018111121119
Siddiqui et al[25], 20181001111NI5
Bagci et al[21], 20181001111NI5
Ravnsborg et al[45], 2016111121119
Huang et al[13], 20161001211NI6
Takhshid and Zare[48], 20151001211NI6
Boyadzhieva et al[32], 20131111111NI7
Nanda et al[43], 20121101111NI6
Skvarca et al[47], 20121001211NI6
Akdeniz et al[31], 20111001111NI5
Kleiblova et al[38], 20101001111NI5
Vitoratos et al[50], 20101001211NI6
Kralisch et al[39], 20091001211NI6
Kuzmicki et al[14], 20091001211NI6
Palik et al[17], 20071001111NI5
Ref.Representativeness of the exposed cohortSelection of the non-exposed cohortAscertainment of exposureDemonstration that outcome of interest was not present at start of studyComparability of cohortsAssessment of outcomeFollow-up long enough for outcomes to occurAdequacy of follow -up of cohortsTotal quality score
Khanam et al[37], 2017011121107
Vitoratos et al[18], 2011011121118