COMPARING STANDARD GAMBLE AND VISUAL ANALOG SCALE MEASURES OF UTILITY FOR ERECTILE DYSFUNCTION HEALTH STATE

Author(s)

Bakken DG1, Tomaszewski K1, Wasserman D1, Claeys C2
1KJT Group, Inc., Honeoye Falls, NY, USA, 2KJT Group Inc., Honeoye Falls, NY, USA

OBJECTIVES: Trade-off measures such as standard gamble (SG) generally are regarded as more valid than direct elicitation measures such as visual analog scale (VAS). The objective was to compare SG and VAS measures of utility for erectile dysfunction health states. METHODS: A representative (U.S.) sample of 1,000 adults completed an online survey about their own (for men) or partner’s (for women in a heterosexual relationship) erectile function health states and quality of life.  Health states utilities were measured using both SG and VAS questions (counterbalanced order).

RESULTS: Looking at the within-subjects comparisons, SG and VAS measures yield very similar but not identical utility estimates for the erectile dysfunction ED health state.  The mean utility estimates across all eligible respondents are 0.41 (0-1 scale) for the SG and 0.44 for the VAS.  Looking just at SG, males have lower utility on average (0.37) for the ED health state than do females for their partner’s ED health state. There was no effect due to the order of presentation.  Additional analysis using covariate matching is underway to determine if there are between-subjects differences in utility for the two measures.
CONCLUSIONS: With respect to obtaining estimates of health state utility or quality of life associated with ED, the SG and VAS measures yielded utility estimates that are comparable for decision-making purposes.  The VAS is easier to administer than the SG, requiring as few as two questions.  Pending the covariate matching to compare the utility estimates for the first position measure, the results indicate that VAS yields utility estimates for ED health state that are very close to estimates obtained using SG.

Conference/Value in Health Info

2014-05, ISPOR 2014, Palais des Congres de Montreal

Value in Health, Vol. 17, No. 3 (May 2014)

Code

PRM93

Topic

Methodological & Statistical Research

Topic Subcategory

PRO & Related Methods

Disease

Reproductive and Sexual Health

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