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Medical Decision Making
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0272989X07300604v1
27/3/288    most recent
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Article

A RAND Meta-Analysis of Prostate Cancer Utilities

Karen E. Bremner, BSc*, Christopher A. K. Y. Chong, MD, George Tomlinson, PhD, Shabbir M. H. Alibhai, MD, MSc, Murray D. Krahn, MD, MSc

* To whom correspondence should be addressed. E-mail: kbremner{at}uhnresearch.ca.


  Abstract
Background. Health-related quality of life is a key issue in prostate cancer (PC) management. The authors summarized published utilities for common health-related quality of life outcomes of PC and determined how methodological factors affect them. Methods. In their systematic review, the authors identified 23 articles in English, providing 173 unique utilities for PC health states, each obtained from 2 to 422 respondents. Data were pooled using linear mixed-effects modeling with utilities clustered within the study, weighted by the number of respondents divided by the variance of each utility. Results. In the base model, the estimated utility of the reference case (scenario of a metastatic PC patient with severe sexual symptoms, rated by non-PC patients using time tradeoff) was 0.76. Disease stage, symptom type and severity, source of utility, and scaling method were associated with utility differences of 0.10 to 0.32 (P <0.05). Utilities from PC patients rating their own health were 0.14 higher than those from the reference case, but utilities from PC patients rating scenarios were lowest. Time tradeoff yielded the highest utilities. Computer administration yielded lower utilities than personal interview (P <0.02). Neither the scale’s high anchor nor study purpose had significant effects on utilities. Conclusions. This study provides pooled utility estimates for common PC health states and describes how clinical and methodological factors can significantly affect these values. When possible, utility estimates for a modeling application should be derived similarly. Formal data synthesis methods might be useful to researchers integrating utility data from heterogeneous sources. Further exploration of these methods for this purpose is warranted. Keywords: prostate cancer; utility assessment; preferences; quality of life; meta-analysis. (MedDecisMakingXXXX;XX:xx-xx)

First published on May 14, 2007, doi:10.1177/0272989X07300604

Medical Decision Making 2007;27:288.

A more recent version of this article appeared on May 1, 2007

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