SynthesisDiabetic medicine : a journal of the British Diabetic Association2026
How effective are CBT and CBT-based interventions in Type 1 and Type 2 diabetes? An umbrella review.
Synthesis in Diabetic medicine : a journal of the British Diabetic Association, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
aimsSignificant evidence base supports cognitive behavioural therapy (CBT) for diabetes. Large variations in practice make it difficult to assess the impact of different types of delivery. This umbrella review aimed to synthesise evidence on the effectiveness of CBT and CBT-based interventions for diabetes-related distress, comorbid depressive symptoms, anxiety symptoms and HbA1c levels. A secondary aim investigated whether effectiveness differs in CBT delivered by a CBT therapist compared to CBT-based interventions that are delivered by multidisciplinary staff.
methodsDatabases like CINAHL, MEDLINE, PsychINFO, PsychArticles and Cochrane Library were searched for systematic reviews and meta-analyses between 2014 and 2023. Review quality was assessed using the Scottish Intercollegiate Guidelines Network checklist. For the secondary aim, findings of randomised controlled trials were distinguished within reviews.
resultsEleven systematic reviews and meta-analyses were included. Four of the reviews were rated as 'high'-quality reviews, five as 'acceptable' and two as 'low'-quality reviews. CBT-based interventions delivered by multidisciplinary staff significantly reduced depressive symptoms, diabetes-related distress and HbA1c levels. CBT therapy delivered by CBT therapists was associated with significant reductions in diabetes-related distress, anxiety symptoms, depressive symptoms and HbA1c levels.
conclusionsCBT and CBT-based interventions were similarly effective for depressive symptoms and HbA1c levels. Anxiety symptoms only improved following CBT delivered by CBT therapists, while diabetes-related distress reduced more than for CBT-based interventions. Significant heterogeneity and variation in quality in reviews mean that further research is required.
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