Study included | Newcastle-Ottawa Scale* |
---|
 |  | 1 | 2 | 3 | 4 | 5A | 5B | 6 | 7 | 8 |
---|
1 | Herr (2003) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
2 | Anger (2010) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
3 | Yapici (2010) | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes | Yes |
4 | Barletta (2009) | Yes | Yes | Yes | No | No | Yes | Yes | Yes | Yes |
5 | Maldonado (2009) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
6 | Dasta (2006) | Yes | Yes | Yes | No | No | No | No | Yes | Yes |
7 | Aziz (2011) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
8 | Shehabi (2009) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
9 | Wunsch (2010) | Yes | Yes | Yes | No | No | No | No | Yes | Yes |
10 | Corbett (2005) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
11 | Reichert (2011)# | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
- *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 as start of study; 5A, cohort comparable on basis of sedation goal level; 5B, cohort comparable on other factor(s); 6, quality of outcome assessment; 7, follow-up long enough for outcomes to occur; and 8, complete accounting for cohorts. #For case-control study, 1 indicates cases independently validated; 2, cases are representative of population; 3, community control; 4, controls have no history of cardiac surgery; 5A, study control for sedation goal level; 5B, study controls for additional factor(s); 6, ascertainment of exposure by blinded interview or record; 7, same method of ascertainment used for cases and controls; and 8, non-response rate the same for cases and controls.