Table 3.

Risk of bias table for cluster randomized control trials and controlled before–after trials

Study	Allocation sequence generation	Allocation concealment	Baseline comparability	Complete outcome data	Outcome variables assessed blindly	Protection from contamination	Selective outcome reporting	Free from other biases
Bristow et al. [42]	High risk	High risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Priestley et al. [12]	High risk	High risk	High risk	High risk	Unclear	Unclear	High risk	Low risk
Hillman et al. [5]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk