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Table 7 Summary of risk of bias (high, low or unclear) in the 11 included quantitative studies

From: The clinical and cost effectiveness of group art therapy for people with non-psychotic mental health disorders: a systematic review and cost-effectiveness analysis

Study Sequence generation Treatment allocation concealment Performance bias (participant blind) Detection bias (outcome assessment blind) Baseline comparability Groups treated equally Selective outcome reporting Incomplete outcome data Researcher allegiance
Beebe 2010 [29] Unclear Unclear High Low Unclear High Low Unclear Low
Broome 2001 [13] Unclear Unclear High Unclear Unclear Low Low Unclear Low
Gussak 2007 [30] Unclear Unclear High Unclear High High Low Unclear High
Hattori 2011 [24] Unclear Unclear High Unclear Low Low Low Low Low
Kim 2013 [15] Unclear Unclear High High Low Low Low Low High
Lyshak-Stelzer 2007 [18] Unclear Unclear High Unclear Low Low Low High Low
McCaffrey 2011 [19] Low Unclear High Unclear Low Low Low Low High
Monti 2006 [16] Unclear Unclear High Unclear High High Low Low Low
Monti 2012 [17] Unclear Unclear High Unclear Low Low Low High Low
Rusted 2006 [20] Unclear Unclear High Unclear High Low Low High Low
Thyme 2007 [14] Low Low High Unclear Unclear Low Low Low Low