Table 4 Newcastle-Ottawa Scale for nonrandomized cohort studies
Study | Selection | Comparability | Outcome | Quality score | |||||
|---|---|---|---|---|---|---|---|---|---|
Representativeness of the Exposed Cohort | Selection of the Non-Exposed Cohort | Ascertainment of Exposure | Demonstration That Outcome of Interest Was Not Present at Start of Study | Comparability of Cohorts on the Basis of the Design or Analysis | Assessment of Outcome | Was Follow-Up Long Enough for Outcomes to Occur | Adequacy of Follow Up of Cohorts | ||
Araujo, 2008 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Plumhans, 2011 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 6 |
Aribaş, 2012 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 6 |
Vetter, 2013 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Liu, 2014 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 7 |
Nagasawa, 2014 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 7 |
Ozbudak, 2014 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Wu, 2014 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
Jung, 2015 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 9 |