Table 3 Methodological assessment based on Newcastle-Ottawa Scale for non-randomized studies
study | Selection (score) | Comparability (score) | Outcome (score) | Total score | |||||
|---|---|---|---|---|---|---|---|---|---|
Represent-ativeness of the exposed cohort | Selection of the nonexpo-sed cohort | Ascertai-nment of exposure | Outcome of interest was not present at start of study | Based on the design or analysis | Assess-ment of outcome | Follow-up long enough for outcomes to occur | Adequ-acy of follow-up of cohorts | ||
Hammond et al, 2013 [45] | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 |
Rasmussen et al, 2014 [39] | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 7 |
Lebon et al, 2014 [46] | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 |
Ödquist et al, 2018 [40] | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 7 |
Fourman et al, 2019 [48] | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 |