We examined whether the effect sizes varied as a function of study characteristics (type of mindfulness-based therapy, study year, number of treatment sessions, quality of study) and clinical characteristics (disorder targeted by the intervention) by using meta-regression analyses. To investigate the effects of categorical moderator variables, we examined 95% confidence intervals. All analyses were completed manually or by using the software program Comprehensive Meta-Analysis, Version 2 (Borenstein, Hedges, Higgins, & Rothstein, 2005).
