Table 2.
Study | Selection | Comparability | Outcome | Quality score | |||||
---|---|---|---|---|---|---|---|---|---|
Representativeness of the exposed cohort6 | Selection of the nonexposed 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 outcome to occur | Adequacy of follow up of cohorts | ||
Holtzman | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 7 | |
Nastoupil | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 7 | |
Sesques | ★ | ★ | ★ | ★ | ★ | ★ | 6 | ||
Neelapu | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 6 | |
Locke | ★ | ★ | ★ | ★ | ★ | 5 | |||
Jacobson | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 7 | |
Ghafouri | ★ | ★ | ★ | ★ | ★ | ★ | 6 | ||
Strati | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 7 |