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. 2022 Jun 10;37(3):261–267. doi: 10.1177/02698811221099645

Table 2.

Summary of Cochrane risk-of-bias tool for randomised trials (version 2).

Study Randomisation process Deviations from intended interventions Missing outcome data Measurement of outcome Selection of reported result Overall bias
Alpay and Turhan (2001) High High Low High Some concerns High
Flores-Ramos et al. (2003) Some concerns Low Low Low High High
Freeman et al. (1999) Some concerns Low Low Low Some concerns Some concerns
Freeman et al. (2002) High Low Low Some concerns Some concerns High
Freeman et al. (2004) Low Low Low Low Some concerns Some concerns
Landén et al. (2007) Low Low Low Low Some concerns Some concerns
Wikander et al. (1998) Low Low Low Low Some concerns Some concerns
Wu et al. (2008) High Low Low Low Some concerns High