|
Study
|
Case definition adequate
|
Representativeness of the cases
|
Selection of controls
|
Definition of controls
|
Comparability based on design or analysis
|
analysis ascertainment of exposure
|
Same method of ascertainment for cases and controls
|
Non-response rate
|
Total scores
|
|---|
|
Yang et al. 2017 [39]
| ★ | ★ | ★ | ★ | ★ ★ | ★ | ★ |
-
|
8
|
|
Ahmad et al. 2016 [40]
| ★ | ★ | ★ | ★ | ★ |
-
| ★ |
-
|
6
|
|
Jannuzzi et al. 2014 [41]
| ★ | ★ |
-
| ★ | ★ ★ | ★ | ★ |
-
|
7
|
|
Credidio et al. 2014 [42]
| ★ | ★ | ★ | ★ | ★ ★ | ★ | ★ |
-
|
8
|
|
Lau et al. 2014 [43]
| ★ | ★ | ★ | ★ | ★ | ★ | ★ |
-
|
7
|
|
Jang et al. 2013 [44]
| ★ | ★ | ★ | ★ | ★ | ★ | ★ |
-
|
7
|
|
Antonacopoulou et al. 2011 [45]
| ★ | ★ | ★ | ★ | ★ | ★ | ★ |
-
|
7
|
|
Wu et al. 2011 [46]
| ★ | ★ | ★ | ★ | ★ | ★ | ★ |
-
|
7
|
|
Wu et al. 2009 [47]
| ★ | ★ | ★ | ★ | ★ ★ | ★ | ★ |
-
|
8
|
|
Ungerbäck et al. 2009 [48]
| ★ | ★ | ★ | ★ | ★★ | ★ | ★ |
-
|
8
|
|
Bae et al. 2008 [49]
| ★ | ★ | ★ | ★ | ★ ★ |
-
| ★ |
-
|
7
|
|
Chae et al. 2008 [50]
| ★ | ★ | ★ | ★ | ★ | ★ | ★ |
-
|
7
|
|
Hofmann et al. 2008 [51]
| ★ | ★ | ★ | ★ | ★ | ★ | ★ |
-
|
7
|
- OR odds ratio, CI confidence interval, I2 I square; each star represents the fulfilled individual criteria within the subsection
