Table 23Dose-response relationship of CBT

Brief versus standard versus intensive CBT
No. trials (total participants)1 RCT
Study IDDURHAM2004
N/% female28/55%
Mean age (years)39
DiagnosisGAD as a primary diagnosis by DSM-IV
Baseline severity (clinician-rated)ADIS score:
Brief CBT – 4.7 (good prognosis)
Standard CBT – 6 (poor prognosis)
Intensive CBT – 5.8 (poor prognosis)
ComparatorsBrief CBT (5 sessions)
Standard CBT (9 sessions)
Intensive CBT (15 sessions)
Treatment length10 weeks
Follow-up6 months


Cover of Generalised Anxiety Disorder in Adults
Generalised Anxiety Disorder in Adults: Management in Primary, Secondary and Community Care.
NICE Clinical Guidelines, No. 113.
National Collaborating Centre for Mental Health (UK).
Leicester (UK): British Psychological Society; 2011.
Copyright © 2011, The British Psychological Society & The Royal College of Psychiatrists.

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