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OBJECTIVES: The purpose of this study was to use standard gamble (SG) utility interviews to assess parent preferences for health states of childhood attention-deficit/hyperactivity disorder (ADHD). METHODS: The study was conducted in August 2003 in London, England. Parents (N=83) of children diagnosed with ADHD completed SG utility interviews, rating their child's current health and 14 hypothetical health states describing untreated ADHD and ADHD treated with a nonstimulant, immediate-release stimulant, or extended-release stimulant. Raw temporary utilities ranging from 0 (worst health) to 1 (best health) were adjusted to a chronic utility scale ranging from 0 (death) to 1 (best health) using a linear transformation. Parents rated the severity of their children's ADHD symptoms using the Attention-Deficit/Hyperactivity Disorder Rating Scale-IV (ADHD-RS) and their children's health-related quality of life using the EuroQol EQ-5D. RESULTS: Raw and adjusted SG ratings of hypothetical health states ranged from 0.63-0.90 and 0.88-0.96, respectively. Parents' raw SG scores of their child's current health state (mean=0.72) were significantly correlated with inattentive, hyperactive, and overall ADHD symptoms (r=-0.25, -0.27, -0.27; P <0.05) and the EQ-5D visual analogue scale (r=0.26; P <0.05). CONCLUSION: This UK-based study suggests that parent SG interviews are a valid method for obtaining utilities for child ADHD-related health states. The utilities obtained in this study would be appropriate for use in a cost-utility analysis evaluating the costs and benefits of childhood ADHD treatments in the United Kingdom.
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