Study year | Quality indicators from the Newcastle-Ottawa scale | Score |
---|
Selection | Comparable | Outcome assessment |
---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
---|
Blach (26) 2009 | * | * | * | * | Â | Â | Â | * | * | 6 |
Kshirsagar (15) 2009 | * | * | * | * | * | * | * | Â | * | 8 |
Chen (16) 2011 | * | * | * | * | Â | * | * | * | * | 8 |
Souza (24) 2014 | * | * | * | * | Â | * | * | * | * | 8 |
Palmer (28) 2015 | * | * | * | * | Â | Â | * | Â | Â | 5 |
Ricardo (14) 2015 | * | * | * | * | Â | Â | * | * | * | 7 |
Chen (27) 2015 | Â | * | * | * | Â | * | * | Â | * | 6 |
Ruokonen (25) 2016 | * | * | * | * | Â | * | * | * | * | 8 |
- Footnote: For cohort studies, 1 indicates exposed cohort truly representative; 2, non-exposed cohort drawn from the same community; 3, ascertainment of exposure; 4, outcome of interest not present at start; 5, cohorts comparable on basis of age; 6, cohorts comparable on other factor(s); 7, quality of outcome assessment; 8, follow-up long enough for outcomes to occur; and 9, complete accounting for cohorts. Each asterisk represents one star in the Newcastle-Ottawa scale system. The maximum number of stars is 2 for comparability and 1 for each of the other categories, for a total of up to 10 stars