Table 2 Details of quality assessment of the included trials
Author, year | Selection | Comparability Comparability of cases and controls on the basis of the design or analysis | Exposure | Quality assess-ment | |||||
|---|---|---|---|---|---|---|---|---|---|
Is the case definition adequate? | Re-presentativeness of the cases | Selection of Controls | Definition of Controls | ||||||
Ascertainment of exposure | Same method of ascertainment for cases and controls | Non-Response rate | |||||||
Ruixiang Zhang et.al, 2014 [1] | * | * | * | ** | ** | * | 8 | ||
Itasu Ninomiya et.al, 2017 [15] | * | * | * | ** | ** | * | 8 | ||
Miao Lin et.al, 2018 [16] | * | * | * | ** | ** | * | 8 | ||
Shinsuke Nomura et.al, 2020 [17] | * | * | * | ** | ** | * | 8 | ||