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Assessment of respondent acceptability for preference measures in stuttering
Duska M Franic1, Anne K Bothe, Robin E Bramlett
1Dept. of Clinical and Administrative Pharmacy, RC Wilson Building Room 260N, University of Georgia, 250 W Green St, Athens, GA 30602, USA. dfranic@rx.uga.edu
Journal of Communication Disorders
|June 12, 2012
Summary
This study found that adults with stuttering preferred rating scales for health quality of life assessments. For economic analyses, standard gamble is recommended for utility, and willingness to pay for cost-benefit evaluations.
Area of Science:
- Health Economics
- Psychometrics
- Speech and Language Pathology
Background:
- Health-related quality of life (HRQoL) is crucial for evaluating interventions in stuttering.
- Standard economic preference measures are used to assess HRQoL but their acceptability in stuttering populations is not well-understood.
Purpose of the Study:
- To evaluate the feasibility of using four standard economic preference measures (rating scale, standard gamble, time trade-off, willingness to pay) for assessing HRQoL in stuttering.
- To assess the acceptability of these measures from the perspective of individuals who stutter.
Main Methods:
- A graphic positioning scale approach was used with 80 adults who stutter.
- Four acceptability variables were assessed: decision-making difficulty, clarity, reasonableness, and comfort.
- Four preference measurement approaches were evaluated: rating scale (RS), standard gamble (SG), time trade-off (TTO), and willingness to pay (WTP).
Main Results:
- Multivariate and univariate analyses revealed significant differences in respondent perceptions across the four preference measurement methods.
- The rating scale was perceived as the easiest, clearest, most reasonable, and most comfortable measure.
- Significant differences were found for all four acceptability variables across the preference measurement methods.
Conclusions:
- The rating scale is highly acceptable for assessing HRQoL changes in stuttering but does not measure utility.
- For cost-utility analyses in stuttering, the standard gamble is recommended over time trade-off.
- Willingness to pay assessments are supported for cost-benefit analyses in stuttering populations.
