Author, year | Research question | Recruitment | Baseline measured | Similar cohorts | Sample size | Causation | Time-frame | Exposure levels | Exposure measurement | Outcome measurement | Blinding | Confounders | Score |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Chan et al., 2012 [20] | y | y | y | y | n | y | y | y | y | y | y | y | 11 |
Constant et al., 2014 [21] | y | y | unclear | y | n | y | y | y | y | y | unclear | y | 9 |
Goldberger et al., 2012 [22] | y | y | unclear | y | n | y | y | y | y | y | y | y | 10 |
Iqbal et al., 2015 [23] | y | y | unclear | y | n | y | y | y | y | y | y | y | 10 |
Reynolds et al., 2013 [24] | y | y | unclear | y | n | y | y | y | y | y | y | y | 10 |
Vancini-Campanharo et al., 2015 [25] | y | n | y | y | n | y | y | y | y | y | unclear | n | 8 |
Xue et al., 2013 [26] | y | n | unclear | y | n | y | y | n | y | y | y | y | 8 |