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Cost-effectiveness of combining systematic identification and treatment of co-morbid major depression for people with chronic diseases: the example of cancer

Published online by Cambridge University Press:  21 August 2013

S. Walker*
Affiliation:
Centre for Health Economics, University of York, Heslington, York, UK
J. Walker
Affiliation:
Psychological Medicine Research, University of Oxford Department of Psychiatry, Warneford Hospital, Oxford, UK
G. Richardson
Affiliation:
Centre for Health Economics, University of York, Heslington, York, UK
S. Palmer
Affiliation:
Centre for Health Economics, University of York, Heslington, York, UK
Q. Wu
Affiliation:
Department of Health Sciences, University of York, Heslington, York, UK
S. Gilbody
Affiliation:
Department of Health Sciences, University of York, Heslington, York, UK
P. Martin
Affiliation:
Psychological Medicine Research, University of Edinburgh Cancer Research Centre, Western General Hospital, Edinburgh, UK
C. Holm Hansen
Affiliation:
Psychological Medicine Research, University of Edinburgh Cancer Research Centre, Western General Hospital, Edinburgh, UK
A. Sawhney
Affiliation:
Psychological Medicine Research, University of Edinburgh Cancer Research Centre, Western General Hospital, Edinburgh, UK
G. Murray
Affiliation:
University of Edinburgh Centre for Population Health Sciences, Edinburgh, UK
M. Sculpher
Affiliation:
Centre for Health Economics, University of York, Heslington, York, UK
M. Sharpe
Affiliation:
Psychological Medicine Research, University of Oxford Department of Psychiatry, Warneford Hospital, Oxford, UK
*
*Address for correspondence: S. Walker, M.Sc., Centre for Health Economics, University of York, Heslington, York YO10 5DD, UK. (Email: simon.walker@york.ac.uk)

Abstract

Background

Co-morbid major depression occurs in approximately 10% of people suffering from a chronic medical condition such as cancer. Systematic integrated management that includes both identification and treatment has been advocated. However, we lack information on the cost-effectiveness of this combined approach, as published evaluations have focused solely on the systematic (collaborative care) treatment stage. We therefore aimed to use the best available evidence to estimate the cost-effectiveness of systematic integrated management (both identification and treatment) compared with usual practice, for patients attending specialist cancer clinics.

Method

We conducted a cost-effectiveness analysis using a decision analytic model structured to reflect both the identification and treatment processes. Evidence was taken from reviews of relevant clinical trials and from observational studies, together with data from a large depression screening service. Sensitivity and scenario analyses were undertaken to determine the effects of variations in depression incidence rates, time horizons and patient characteristics.

Results

Systematic integrated depression management generated more costs than usual practice, but also more quality-adjusted life years (QALYs). The incremental cost-effectiveness ratio (ICER) was £11 765 per QALY. This finding was robust to tests of uncertainty and variation in key model parameters.

Conclusions

Systematic integrated management of co-morbid major depression in cancer patients is likely to be cost-effective at widely accepted threshold values and may be a better way of generating QALYs for cancer patients than some existing medical and surgical treatments. It could usefully be applied to other chronic medical conditions.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 2013 

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