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Nicholas Tarrier a Department of Clinical Psychology, School of
Psychiatry and Behavioural Sciences, University of Manchester,
Withington Hospital, Manchester M20 8LR, b Department of Medical Statistics, University of Manchester
Correspondence to: Professor Tarrier
ntarrier{at}fs1.with.man.ac.uk
Objectives: To investigate whether intensive
cognitive behaviour therapy results in significant improvement in
positive psychotic symptoms in patients with chronic schizophrenia.
Design: Patients with chronic schizophrenia were
randomly allocated, stratified according to severity of symptoms and sex, to intensive cognitive behaviour therapy and routine care, supportive counselling and routine care, and routine care alone.
Setting: Adjunct treatments were carried out in
outpatient clinics or in the patient's home.
Subjects: 87 patients with persistent positive
symptoms who complied with medication; 72 completed treatment.
Outcome measures: Assessments of positive psychotic
symptoms before treatment and 3 months after treatment. Number of
patients who showed a 50% or more improvement in symptoms. Exacerbation of symptoms and rates of readmission to hospital.
Results: Significant improvements were found in the
severity (F=5.42, df =2,86; P=0.006) and number
(F=4.99, df=2,86; P=0.009) of positive symptoms in those
treated with cognitive behaviour therapy. The supportive counselling
group showed a non-significant improvement. Significantly more patients
treated with cognitive behaviour therapy showed an improvement of 50%
or more in their symptoms (
2=5.18, df=1; P=0.02).
Logistic regression indicated that receipt of cognitive behaviour
therapy results in almost eight times greater odds (odds ratio 7.88) of
showing this improvement. The group receiving routine care alone also
experienced more exacerbations and days spent in hospital.
Conclusions: Cognitive behaviour therapy is a
potentially useful adjunct treatment in the management of patients with chronic schizophrenia.
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