A multi-service practice research network study of large group psychoeducational cognitive behavioural therapy

Jaime Delgadillo*, Stephen Kellett, Shehzad Ali, Dean McMillan, Michael Barkham, David Saxon, Gill Donohoe, Heather Stonebank, Sarah Mullaney, Patricia Eschoe, Richard Thwaites, Mike Lucock

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Background This was a multi-service evaluation of the clinical and organisational effectiveness of large group psychoeducational CBT delivered within a stepped care model. Method Clinical outcomes for 4451 participants in 163 psychoeducational groups delivered across 5 services were analysed by calculating pre-post treatment anxiety (GAD-7) effect sizes (Cohen's d). Overall and between-service effects were compared to published efficacy benchmarks. Multilevel modelling was used to examine if variability in clinical outcomes was explained by differences in service, group and patient-level (case-mix) variables. Results The pooled GAD-7 (pre-post) effect size for all services was d = 0.70, which was consistent with efficacy benchmarks for guided self-help interventions (d = 0.69). One service had significantly smaller effects (d = 0.48), which was explained by differences in group treatment length and case-mix. Variability between groups (i.e., group effects) explained up to 3.6% of variance in treatment outcomes. Conclusions Large group psychoeducational CBT is clinically effective, organisationally efficient and consistent with a stepped care approach to service design. Clinical outcome differences between services were explained by group and patient variables.

Original languageEnglish
Pages (from-to)155-161
Number of pages7
JournalBehaviour Research and Therapy
Publication statusPublished - 1 Dec 2016
Externally publishedYes


  • Anxiety
  • Depression
  • IAPT
  • Low intensity cognitive behavioural therapy
  • Multilevel modelling
  • Psychoeducation

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