Cognitive behavioural therapy (RP) versus brief interventions

Quality assessment
No of studiesDesignLimitationsConsistencyDirectnessOther considerations
Abstinence from cannabis (Brief vs Individual CBT) (Copeland 2001, Stephens 2002)
2Randomised trialsNo limitationsNo important inconsistencySome uncertainty (−1)4None
Abstinence from amphetamines (Brief vs Individual CBT) (Baker (2005)
1Randomised trialsNo limitationsNo important inconsistencySome uncertainty (−1)4Imprecise or sparse data (−1)2
Cannabis use at 4 month follow up (Brief vs Individual CBT) (Stephens, 2002)
1Randomised trialsNo limitationsNo important inconsistencySome uncertainty (−1)4Imprecise or sparse data (−1)2
Abstinence from cannabis (Brief vs Group CBT) ((Stephens, 2000) Follow up: )
1Randomised trialsNo limitationsNo important inconsistencySome uncertainty (−1)4Imprecise or sparse data (−1)3
Cannabis use at 7 month follow up (Brief vs Group CBT) (Stephens, 2000)
1Randomised trialsNo limitationsNo important inconsistencySome uncertainty (−1)4Imprecise or sparse data (−1)3
Summary of findings
OutcomeNo of patientsEffectQuality
Brief interventionsCBTRelative (95% CI)Absolute (95% CI)
Abstinence from cannabis (Brief vs Individual CBT)38/234 (16.2%)14/228 (6.1%)RR 2.60 (1.45 to 4.66)-⊕⊕⊕○
Moderate
Abstinence from amphetamines (Brief vs Individual CBT)25/74 (33.8%)25/66 (37.9%)RR 0.89 (0.57 to 1.39)-⊕⊕○○
Low
Cannabis use at 4 month follow up (Brief vs Individual CBT)133128-SMD −0.52 (−0.77 to −0.28)⊕⊕○○
Low
Abstinence from cannabis (Brief vs Group CBT)35/117 (29.9%)28/88 (31.8%)RR 0.94 (0.62 to 1.42)-⊕⊕○○
Low
Cannabis use at 7 month follow up (Brief vs Group CBT)9572-SMD 0.04 (−0.26 to 0.35)⊕⊕○○
Low
1

I-squared > 50%

2

1 study

3

CIs compatible with benefit and no benefit

4

No UK studies

From: APPENDIX 16, EVIDENCE PROFILE TABLES

Cover of Drug Misuse
Drug Misuse: Psychosocial Interventions.
NICE Clinical Guidelines, No. 51.
National Collaborating Centre for Mental Health (UK).
Leicester (UK): British Psychological Society; 2008.
Copyright © 2008, The British Psychological Society & The Royal College of Psychiatrists.

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