Author | Year | Selection | Comparability | Outcome | Total Score |
---|---|---|---|---|---|
Prospective Cohort | |||||
Gebhardt et al. [23], | 2006 | 2/4 | 1/2 | 3/3 | 6/9 |
Klyne et al. [26], | 2018a | 2/4 | 2/2 | 2/3 | 6/9 |
Sturmer et al. [28], | 2005 | 2/4 | 1/2 | 2/3 | 5/9 |
Case-control | |||||
Heffner et al. [24], | 2011 | 1/4 | 2/2 | 1/3 | 4/9 |
Klyne et al. [25], | 2017a | 4/4 | 2/2 | 1/3 | 7/9 |
Luchting et al. [27], | 2016 | 2/4 | 2/2 | 0/3 | 4/9 |
Wang et al. [30], | 2008 | 2/4 | 1/2 | 1/3 | 4/9 |
Prospective Cross-sectional study | |||||
Wang et al. [29], | 2010 | 4/5 | 2/2 | 1/3 | 7b/10 |