Table 2.

Risk of bias assessment extracted from included studies

Author name, year	Random sequence generation	Allocation concealment	Blinding of participants and personnel	Sampling bias	Baseline imbalance	Blinding of outcome assessment	Incomplete outcome data	Selective outcome reporting	Contamination	Potential confounding
de Silva-Sanigorski et al. 2011(30)	High risk	Unclear risk	Unclear risk	High risk	Unclear risk	High risk	Unclear risk	Unclear risk	Unclear risk	Unclear risk
Trost et al. 2011(37)	High risk	High risk	Unclear risk	High risk	Low risk	High risk	Low risk	Unclear risk	Unclear risk	Unclear risk