Cognitive behavioural therapy by nurses v treatment as usual for schizophrenia‡

Mean change from baseline score (95% CI)
Outcomes at 2–3 monthsCBTTreatment as usualDifference in mean change scoreNNT
‡AMRS = Åsberg-Montgomery Rating Scale; BCQ = Burden of Care Questionnaire; CPRS = Comprehensive Psychopathological Rating Scale; IRS = Insight Rating Scale; NNT = number needed to treat for 1 additional person to have a >50% improvement; NS = not significant; SCS = Schizophrenia Change Scale.
§Difference favours the treatment group.
Overall symptoms (CPRS) 3.65 (2.4 to 4.9) 1.69 (−0.004 to 3.3)−2.3 (p=0.015)§13
Insight (IRS)−1.2 (−1.6 to 0.8) 0.1 (−0.4 to 0.6) 1.3 (p<0.001)§10
Depression (AMRS) 0.8 (0.4 to 1.3) 0.3 (−0.3 to 0.9)−0.9 (p=0.003)§ 9
Schizophrenic symptoms (SCS) 0.6 (0.1 to 1.0) 0.3 (−0.2 to 0.9)−0.4 (p=0.258)NS
Burden of care (BCQ)−2.2 (−0.7 to 5.0)−1.0 (−6.8 to 4.8)−4.3 (p=0.126)NS