PMID- 14519610 OWN - NLM STAT- MEDLINE DCOM- 20031204 LR - 20220309 IS - 0007-1250 (Print) IS - 0007-1250 (Linking) VI - 183 DP - 2003 Oct TI - Estimating psychological treatment effects from a randomised controlled trial with both non-compliance and loss to follow-up. PG - 323-31 AB - BACKGROUND: The Outcomes of Depression International Network (ODIN) trial evaluated the effect of two psychological interventions for the treatment of depression in primary care. Only about half of the patients in the treatment arm complied with the offer of treatment, prompting the question:'what was the effect of treatment in those patients who actually received it?' AIMS: To illustrate the estimation of the effect of receipt of treatment in a randomised controlled trial subject to non-compliance and loss to follow-up. METHOD: We estimated the complier average causal effect (CACE) of treatment. RESULTS: In the ODIN trial the effect of receipt of psychological intervention (an average of about 4 points on the Beck Depression Inventory) is about twice that of offering it. CONCLUSIONS: The statistical analysis of the results of a clinical trial subject to non-compliance to allocated treatment is now reasonably straightforward through estimation of a CACE and investigators should be encouraged to present the results of analyses of this type as a routine component of a trial report. FAU - Dunn, G AU - Dunn G AD - Biostatistics Group, School of Epidemiology & Health Sciences, University of Manchester, UK. g.dunn@man.ac.uk FAU - Maracy, M AU - Maracy M FAU - Dowrick, C AU - Dowrick C FAU - Ayuso-Mateos, J L AU - Ayuso-Mateos JL FAU - Dalgard, O S AU - Dalgard OS FAU - Page, H AU - Page H FAU - Lehtinen, V AU - Lehtinen V FAU - Casey, P AU - Casey P FAU - Wilkinson, C AU - Wilkinson C FAU - Vazquez-Barquero, J L AU - Vazquez-Barquero JL FAU - Wilkinson, G AU - Wilkinson G CN - ODIN group LA - eng PT - Clinical Trial PT - Journal Article PT - Multicenter Study PT - Randomized Controlled Trial PT - Research Support, Non-U.S. Gov't PL - England TA - Br J Psychiatry JT - The British journal of psychiatry : the journal of mental science JID - 0342367 SB - IM MH - Data Interpretation, Statistical MH - Depressive Disorder/*therapy MH - Humans MH - Patient Participation MH - Psychotherapy/*methods MH - Sensitivity and Specificity MH - Treatment Outcome MH - Treatment Refusal EDAT- 2003/10/02 05:00 MHDA- 2003/12/05 05:00 CRDT- 2003/10/02 05:00 PHST- 2003/10/02 05:00 [pubmed] PHST- 2003/12/05 05:00 [medline] PHST- 2003/10/02 05:00 [entrez] AID - S0007125000163299 [pii] AID - 10.1192/bjp.183.4.323 [doi] PST - ppublish SO - Br J Psychiatry. 2003 Oct;183:323-31. doi: 10.1192/bjp.183.4.323.