Table 1. Assessment of clinical trials using Cochrane risk of bias tool for included studies.

RCT: randomized controlled trial

Source: The Cochrane Collaboration’s tool for assessing the risk of bias in randomized trials [18].

 

RCT	Random Sequence Generation	Allocation Concealment	Blinding of Participants and Professionals	Blinding of Outcome Assessors	Incomplete Outcomes	Selective Outcome Reporting
Demling, 1999 [14]	Low risk	Unclear	Low risk	Low risk	Low risk	Low risk
Demling and Orgill, 2000 [19]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Demling and DeSanti, 2003 [20]	Low risk	Unclear	Low risk	Low risk	Low risk	Low risk
Bauman et al., 2013 [21]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Demling and DeSanti, 2002 [22]	Low risk	Unclear	Low risk	Low risk	Low risk	Low risk
Demling and DeSanti, 2001 [23]	Low risk	Unclear	Low risk	Low risk	Low risk	Low risk