Association between ADAM12 Single-Nucleotide Polymorphisms and Knee Osteoarthritis: A Meta-Analysis
Table 2
Quality assessment of included studies.
Item/study
Kerna et al., 2009
Lou et al., 2014
Poonpet et al., 2016
Rodriguez-Lopez et al., 2009
Shin et al., 2012
Valdes et al., 2006
Wang et al., 2015
Adequate definition of cases
Representativeness of cases
—
—
—
—
—
—
Selection of control subjects
—
—
—
—
—
—
—
Definition of control subjects
Control for important factor or additional factor
—
—
—
—
Exposure assessment
Same method of ascertainment for all subjects
Nonresponse rate
A study could be awarded a maximum of one for each item except for the item “control for important factor or additional factor.” The definition/explanation of each column of the Newcastle-Ottawa Scale is available from http://www.ohri.ca/programs/clinical_epidemiology/oxford.asp.