Study [n = 6] | Study Participation | Study Attrition [Follow-up] | Prognostic Factor | Outcome | Confounding Factor | Analysis | Overall Risk of Bias |
---|---|---|---|---|---|---|---|
Divecha et al., 2014 | High | High | Moderate | Low | Moderate | Low | High |
Fischer et al., 2004 | Moderate | High | Moderate | Low | Low | Moderate | High |
Lewis et al., 1987 and Weir 1979 | High | High | Moderate | Low | High | High | High |
Nygaard et al., 2000 | High | High | Moderate | Low | High | High | High |
Silverplats et al., 2010 and Silverplats et al., 2011 | Moderate | Moderate | Low | Low | Low | Low | Low |
Solberg et al., 2005 | Moderate | High | Low | Low | High | Moderate | High |