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Health State Utilities for Achondroplasia: A Time Trade-Off Study
Claudia Mighiu1, George Morgan1, Rashmi Bharali1
1Prime HCD, Mere House, Knutsford, Cheshire, England, UK.
Summary
Health state utility values for achondroplasia are lower than the general population, especially with complications. Complications significantly reduce quality of life valuations, particularly in older individuals with achondroplasia.
Area of Science:
- Genetics and rare diseases
- Health economics
- Quality of life research
Background:
- Achondroplasia is a rare genetic disorder causing disproportionate short stature.
- It can lead to severe complications impacting quality of life.
- Understanding patient-reported outcomes is crucial for treatment evaluation.
Purpose of the Study:
- To determine health state utility values (HSUVs) for achondroplasia.
- To assess the impact of age and complications on HSUVs.
- To use a time trade-off valuation approach with the general public.
Main Methods:
- Defined 10 health states across different age groups (0-18+ years).
- Included states with and without major complications.
- Conducted face-to-face interviews using a time trade-off method in the UK and US.
Main Results:
- Analyzed data from 354 respondents.
- Highest HSUVs were for youngest age groups without complications (0.73-0.76).
- Lowest HSUVs were for older age groups with complications (0.55).
- Complications significantly reduced HSUVs across age groups (P < .05).
Conclusions:
- HSUVs for achondroplasia are generally lower than normative values.
- Complications substantially decrease utility valuations.
- The impact of complications is more pronounced in older individuals with achondroplasia.
