Review Article

Systematic Meta-analysis Revealed an Association of PGC-1α rs8192678 Polymorphism in Type 2 Diabetes Mellitus

Table 2

Results of quality assessment by NOS.

Study IDYearSelectionComparabilityExposureScore
Adequate definition of casesRepresentativeness of casesSelection of controlsDefinition of controlsControl for important factorsAscertainment of exposureSame method of ascertainment for cases and controlsNon-response rate

Bhat et al. (a)20077
Bhat et al. (b)20077
Cheema et al. (a)20157
Cheema et al. (b)20156
Chen et al.20048
De-yao et al.20147
Ek et al. (a)20016
Ek et al. (b)20016
Fanelli et al.20054
Hui et al.20096
Jemaa et al.20157
Kim et al.20056
Kruzliak et al.20157
Kunej et al.2004☆☆5
Lacquemant et al.20025
Lu et al.20065
Sharma et al.20186
Shokouhi et al.20158
Sun et al.2006☆☆8
Weng et al.2010☆☆7
Zhang et al.20077
Zhu et al.20176
Zhu et al.20098

Note: a study can be awarded a maximum of one star for each numbered item within the Selection and Exposure categories. A maximum of two stars can be given for Comparability. A maximum of 2 stars can be allotted in this category, one for age, the other for other controlled factors (gender, BMI, WHR, and so on).