Table 4.

Risk of bias assessment for included studies.

Study	Confound-ing	Selection Bias	Classification of Interventions	Deviations from Intended Interventions	Missing Data	Measure-ment of Outcomes	Selection of Reported Results
Debelak et al. [12]	Low	Low	Low	Low	Low	Low	Low
Dooley et al. [17]	Moderate	Low	Moderate	Low	Low	Low	Low
Gawronski et al. [15]	Moderate	Low	Moderate	Low	Low	Low	Low
Jumah et al. [18]	Moderate	Low	Moderate	Low	Low	Low	Low
Mullins et al. [14]	Low	Moderate	Low	Low	Low	Low	Low
Nguyen et al. [13]	Low	Low	Low	Low	Low	Low	Low
Wiegand et al. [16]	Low	Low	Low	Low	Low	Low	Low