Investigation of Health utility measure using by item response theory

受试者442例(平均年龄74.8±12.4岁，其中女性236例)，其中脑血管疾病296例，髋部骨折146例。总体效用得分为-0.01，视力为0.81，听力为0.82，言语为0.68，行走为0.21，灵巧度为0.67，情感为0.63，认知为0.44，疼痛为0.67。从IRT来看，回族在言语、行走、情感、认知等方面具有较高的辨别力，但难度中等(视力0.56，听力0.84，言语1.57，灵巧性1.29，情感0.86，认知1.02，疼痛1.83，疼痛0.71)。HUI3表明康复方面的有效措施。

Subjects were 442 patients (The mean ages were 74.8±12.4 years, including 236 women) comprising 296 patients with cerebrovascular disease and 146 patients with hip fracture. Global utility score was -0.01, vision was 0.81, hearing was 0.82, speech was 0.68, ambulation was 0.21, dexterity was 0.67, emotion was 0.63, cognition was 0.44 and pain was 0.67. Ambulation and cognition were lower score.By IRT, difficulty were moderate and discrimination were excellent (vision ; 0.56, hearing ; 0.84, speech ; 1.57, ambulation ; 1.29, dexterity ; 0.86, emotion ; 1.02, cognition ; 1.83 ; pain ; 0.71) in HUI3.In conclusion, HUI have high discrimination in speech, ambulation, emotion and cognition. HUI3 indicate an available measure in rehabilitation.