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Randomized comparative study of group versus individual cognitive behavioural therapy for obsessive compulsive disorder . OBJECTIVE The primary aim of the study was to compare the effectiveness of group and individual cognitive behaviour therapy ( CBT ) for obsessive compulsive disorder ( OCD ) . METHOD One hundred and ten out-patients with OCD were randomly assigned to 15 sessions of either group CBT or individual CBT . Outcome measures were administered before and after treatment , as well as at 6- and 12-month follow-ups . The study was supplemented by a meta-analysis of accomplished comparative studies of group vs. individual CBT for OCD . RESULTS Large and stable pre-post effect sizes were found for both treatment conditions in the study ( d = 1.06-1.24 on the Yale-Brown Obsessive Compulsive Scale ) . There were no significant between-group differences in outcome at any data point ( ds= -0.13 to 0.15 ) . The meta-analysis of four accomplished comparative studies ( including the present one ) found a between-group mean effect size of ( d= 0.15 favouring individual over group CBT at posttreatment ( 95 % confidence interval , -0.12 , 0.42 ) . CONCLUSION The results of this study suggest that OCD can be treated effectively with a group format of CBT , thus sparing some therapist resources , although the four accomplished comparative studies do not rule out the possibility of a small superiority of individually conducted CBT .
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Intervention_Psychological
group versus individual cognitive behavioural therapy
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Intervention_Psychological
group and individual cognitive behaviour therapy ( CBT )
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Intervention_Psychological
group CBT or individual CBT .
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Intervention_Psychological
group vs. individual CBT
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Intervention_Psychological
CBT
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Intervention_Educational
group format of CBT
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Intervention_Psychological
CBT
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Outcome_Other
effect sizes
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Outcome_Other
Yale-Brown Obsessive Compulsive Scale
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Outcome_Other
effectively