Table 2 Risk of bias of included randomized and non-randomized controlled trials
From: Cannabinoids and orthopedic surgery: a systematic review of therapeutic studies
Randomized controlled trials | ||||||||
|---|---|---|---|---|---|---|---|---|
Study | Randomization | Deviation from intended effects | Missing outcome data | Measurement of outcome | Selection of the reported result | Overall | ||
Beaulieu et al. [17] | High | SC | Low | Low | SC | High | ||
Hunter et al.a [18] | SC | SC | SC | Low | SC | SC | ||
Jain et al. [19] | Low | Low | Low | Low | SC | SC | ||
Levin et al. [20] | Low | Low | Low | Low | Low | Low | ||
Crossover trials | ||||||||
Study | Randomization | Carry-over | Deviation from intended intervention | Missing outcome data | Measurement of outcome | Selection of reported results | Overall | |
Notcutt et al. [22] | Low | SC | Low | Low | Low | Low | SC | |
Yassin et al. [23] | High | SC | SC | Low | SC | Low | High | |
Yassin et al. [24] | High | SC | SC | Low | SC | Low | High | |
Comparative parallel non-randomized trials | ||||||||
Study | Confounding | Selection | Classification | Deviation from intended intervention | Missing Data | Measurement of outcomes | Selection of reported results | Overall |
Hickernell et al. [9] | Moderate | Low | Low | Moderate | Low | Moderate | Low | Moderate |
Holdcroft et al. [25] | Moderate | Low | Low | Low | Low | Moderate | Low | Moderate |
Ware et al. [21] | Moderate | Moderate | Low | Low | Low | Low | Low | Moderate |