Mindfulness-Based Therapies in the Treatment of Functional Gastrointestinal Disorders: A Meta-Analysis

Table 2

Cochrane risk of bias assessment of studies included in systematic review.

Reference	Random sequence generation (selection bias)	Allocation concealment (selection bias)	Blinding of participants and personnel (performance bias)	Blinding of outcome assessment (detection bias)	Incomplete outcome data (attrition bias)	Selective reporting (reporting bias)	Other bias	Overall
Berrill et al. 2014 [14]	Low	Low	High	Unclear	High	Low	Low	High
Gaylord et al. 2011 [15]	Low	Unclear	Low*	Low	Unclear	Low	Low	Unclear
Ljtsson et al. 2010 [16]	Low	Low	High	Unclear	Low	Low	Unclear	High
Ljtsson et al. 2011 (long term) [17]	As Ljtsson et al. 2010 [16]	As Ljtsson et al. 2010 [16]	As Ljtsson et al. 2010 [16]	As Ljtsson et al. 2010 [16]	Low	Low	Low	High
Ljtsson et al. 2011 (Acceptability) [18]	Low	Low	High	Unclear	Unclear	Low	Low	High
Ljtsson et al. 2011 (Internet) [19]	Low	Low	Low*	Unclear	Low	Low	Low	Unclear
Zernicke et al. 2013 [20]	Low	Unclear	High	Unclear	Unclear	Low	Low	High
Zomorodi et al. 2014 [21]	Unclear	Unclear	Low*	Unclear	Unclear	High	Unclear	High

Low*: study participants were blind; however due to the nature of a psychological intervention, those providing the intervention were not blind.