Peter M. Fayers

Ron D. Hays

Researchers in all clinical fields are fully aware of the importance of Quality of Life measurements in judging the efficacy of a given treatment. Psychological criteria play an important role in this evaluation. Assessment of Quality of Life in Clinical Trials: methods and practice explores the current state of the art and illustrates the benefits and potential of health related quality of life assessment in clinical trials. It covers a wide range of analytical issues, emphasizing new and innovative approaches that are of practical and clinical importance.

Methods and Practice

Assessing Quality of Life in Clinical Trials

Rand Corporation

Grant N. Marshall

This article reports on the development and psychometric properties of a short-form version of the 50-item Patient Satisfaction Questionnaire III (PSQ-III). The short-form instrument, the PSQ-18, contains 18 items tapping each of the seven dimensions of satisfaction with medical care measured by the PSQ-III: general satisfaction, technical quality, interpersonal manner, communication, financial aspects, time spent with doctor, and accessibility and convenience. PSQ-18 subscale scores are substantially correlated with their full-scale counterparts and possess generally adequate internal consistency reliability. Moreover, both the magnitude of the correlation coefficients and the overall pattern of correlations among PSQ-18 subscales are highly similar to those observed for the PSQ-III. These preliminary analyses support the use of the PSQ-18 in situations where the need for brevity precludes administration of the full-length PSQ-III.

Ron D. Hays

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