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Revicki, D.A. et al.

Revicki, Leidy, Brennan-Diemer, Sorensen, Togias,

Integrating patient preferences into health outcomes assessment: the multiattribute Asthma Symptom Utility Index.

STUDY OBJECTIVE: To develop and evaluate a brief, easy-to-administer symptom assessment scale for use as a preference-based outcome measure in clinical trials and cost-effectiveness studies in asthma. DESIGN: Cross-sectional survey with 2-week reproducibility assessment. SETTING: Ambulatory care: university asthma and allergy center. PARTICIPANTS: One hundred sixty-one adults with asthma, 59% female, mean age 35+/-11 years. Mean FEV1 percent predicted was 86+/-17%. INTERVENTIONS: The 11-item Asthma Symptom Utility Index (ASUI). MEASUREMENTS AND RESULTS: Mean ASUI score for this sample was 0.71+/-0.23, with a range from 0.02 to 1. 0. The ASUI was reproducible (intraclass correlation coefficient = 0.74) and able to distinguish patients known to differ on disease severity according to clinician ratings (p < 0.001) and by an asthma disease severity scale score (p < 0.001). The instrument was also significantly correlated with FEV1 percent predicted (r = 0.27, p < 0.001), the Asthma Quality of Life Questionnaire (r = 0.77, p < 0.001), and the Health Utilities Index Mark 2 (r = 0.36, p < 0.001). CONCLUSION: The results of this study support the reliability and validity of the ASUI, suggesting it will be a useful, complementary patient outcome measure for clinical trials and cost-effectiveness studies comparing treatment alternatives for persons with asthma.[1]

References

Integrating patient preferences into health outcomes assessment: the multiattribute Asthma Symptom Utility Index. Revicki, D.A., Leidy, N.K., Brennan-Diemer, F., Sorensen, S., Togias, A. Chest (1998) [Pubmed]

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