Evaluating Asthma Symptom Utility Index Preferences Across Countries
Author Information
Author(s): Emuella Flood, Erwin De Cock, Ann-Christin Mörk, Dennis A Revicki
Primary Institution: United BioSource Corporation
Hypothesis
The study aims to determine whether the multi-attribute utility function for the Asthma Symptom Utility Index (ASUI), based on US preferences, is generalizable across European countries.
Conclusion
The study suggests that the ASUI may be a useful complementary patient-reported outcome for clinical studies and cost-effectiveness analyses in asthma treatment.
Supporting Evidence
- Patients rated their preferences for 10 asthma health states using visual analogue scale and standard gamble methods.
- Statistically significant differences were found in mean VAS scores between countries.
- The ASUI scores varied by disease severity and were correlated with asthma quality of life scores.
Takeaway
This study looked at how asthma patients in different countries feel about their symptoms, finding that their preferences can vary, but the overall ranking of severity is similar.
Methodology
Data were collected from 90 asthma patients in Italy, France, and the UK using questionnaires and interviews to assess their preferences for asthma health states.
Potential Biases
Cultural differences in perception and valuation of asthma symptoms may introduce bias in preference ratings.
Limitations
The sample sizes for European countries were small (30 each), which may affect the stability of the utility estimates.
Participant Demographics
56% female, mean age 45 years, 66% employed, and 46% had a university or post-graduate degree.
Statistical Information
P-Value
p < 0.001
Statistical Significance
p < 0.001
Digital Object Identifier (DOI)
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