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Table 2 Quality assessment of studies included in this meta-analysis by Newcastle-Ottawa Scale

From: Is diabetes mellitus a risk factor for low bone density: a systematic review and meta-analysis

Study Selection Comparability Exposure Quality evaluation
Cases definition Cases representativeness Control selection Controls definition Comparability Ascertainment of exposure Same ascertainment Non-response rate
Shaw CK 1993 [33] a b a a b b a a 7
Chumnumnawin M 2008 [34] a a b a b b a a 7
El-Heis MA 2013 [35] a b b a b b a a 6
Zhou R 2013 [36] a a a a a + b b a a 8
Daisuke A 2015 [37] a a b a b b a a 7
Saei GNM 2015 [38] a a b a b b a a 7
Liu D 2016 [39] a a a a a + b b a a 9
Neglia C 2016 [40] a b c a b b a a 6
Dana H 2017 [41] a a a a b b a a 8
Heidari B 2017 [42] a a a a b b a a 8
Lee SH 2017 [43] a a a a b b a a 8
Lin HH 2018 [44] a b b a b b a a 6
Yoo JE 2018 [45] a a b a a + b b a a 8
Wang Y 2019 [46] a a b a b b a a 7