The importance of health-related quality-of-life data in determining the value of drug therapy

Background: The rapid evolution of outcomes research during the last decade has led to increasing emphasis on measures of health-related quality of lift: (HRQOL). However, the relatively recent advent of these measures makes it difficult to decide how much weight to attribute to them in decisions about the value of drug therapy. Objective: The aim of this article is to discuss the factors that affect the relative importance of HRQOL data in determining the value of drug therapy. Conclusions: The relative importance of HRQOL data depends on the type of condition and the type of treatment. In chronic conditions, HRQOL may be considered a primary measure of efficacy. In acute conditions, HRQOL is not likely to be: a primary efficacy measure, although excluding HRQOL measures may lend to an underestimation of treatment effects. Measures of HRQOL are also likely to be important in the assessment of palliative treatments and, to some extent, preventive treatments (primarily in the measurement of adverse effects). HRQOL measures will be less important in the assessment of curative treatments because these types of treatment are most relevant in acute conditions.