Table 3 Assessment of risk of bias using SYRCLE’s tool
Risk of bias | Study | ||||
|---|---|---|---|---|---|
Maïmoun et al. 2010 [29] | Li et al. 2010 [32] | Li et al. 2012 [33] | Linderbäck et al. 2012 [30] | Chen et al. 2013 [31] | |
Selection | |||||
Sequence generation | L | L | U | L | L |
Baseline characteristics | L | L | L | L | L |
Allocation concealment | U | L | U | U | U |
Performance | |||||
Random housing | U | U | U | U | U |
Blinding | U | L | U | L | U |
Detection | |||||
Random outcome assessment | U | U | U | U | U |
Blinding | U | U | L | U | U |
Attrition | |||||
Incomplete outcome data | U | U | U | U | U |
Reporting | |||||
Selective outcome reporting | L | L | L | L | L |
Other sources of bias | H | H | H | H | H |