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Review: cognitive behavioural therapy is more effective than control and similarly effective to pharmacotherapy for generalised anxiety disorder

Study selection and analysis: Eligible studies were controlled trials of cognitive behavioural therapy and/or pharmacotherapy for people with generalised anxiety disorder. Exclusions: not published in English or German; case studies; pharmacotherapy for ,14 days; studies using CBT techniques as a control; or insufficient information to calculate effect size and other statistical data. Data were extracted on anxiety, depression, quality of life, and clinical significance, including meaningful improvement and end-state status compared to people without generalised anxiety disorder. Effect sizes were calculated using Hedge’s d. Random effects analysis was carried out to calculate mean effect sizes across studies.