In this study we examined the psychometric properties of the World Health Organization Disability Assessment Schedule (WHODAS 2.0 12-item version) in a mild traumatic brain injury (MTBI) sample.Materials and Methods: Treatment-seeking adults (n = 131) with MTBI recruited from outpatient clinics in Vancouver Canada, were assessed 1- and 3-months following clinic intake. Dimensionality, reliability, and differential item functioning of the WHODAS 2.0 were examined with Rasch analysis. Associations between change in WHODAS 2.0 scores and symptom, work and perceived improvement outcomes were examined.Results: Adequate fit to the Rasch model was achieved for 1-month follow-up assessment WHODAS 2.0 scores without altering the response format or item content [X2 (24, n = 130) = 21.2, p = .6]. The best model fit for 3-month follow-up assessment scores was achieved when two items (problems with dressing and washing) were combined [X2 (22, n = 115) = 20.9, p = .5]. Associations were evident between changes in WHODAS total Rasch scores and other outcome indicators such as return to productivity and percieved improvement.Conclusions: The WHODAS 2.0 (12-item version) is a psychometrically sound measure of functional outcome for adults seeking treatment following MTBI. Our table of ordinal to interval score conversions is recommended for future research examining MTBI outcomes.

中文翻译：

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在轻度脑外伤样本中对世界卫生组织残疾评估表2.0的Rasch分析。

在这项研究中，我们在轻度脑外伤（MTBI）样本中检查了世界卫生组织《残疾评估时间表》（WHODAS 2.0 12个项目）的心理计量学特性。材料和方法：寻求治疗的成年人（n = 131）患有MTBI从加拿大温哥华的门诊诊所招募的患者，在入院后1个月和3个月进行了评估。使用Rasch分析检查了WHODAS 2.0的尺寸，可靠性和差异项功能。研究结果显示：WHODAS 2.0得分的变化与症状，工作和感知的改善结果之间的相关性。结果：在不改变回答格式或项目内容的情况下，为期1个月的随访评估WHODAS 2.0得分与Rasch模型完全吻合[X2（ 24，n = 130）= 21.2，p = .6]。当两个项目（穿衣和洗衣服的问题）结合在一起时，[X2（22，n = 115）= 20.9，p = .5]达到了三个月随访评估分数的最佳模型。WHODAS总Rasch分数的变化与其他结果指标（例如生产力的恢复和明显改善）之间存在明显的联系。结论：WHODAS 2.0（12个项目）是从心理上对功能性结局进行心理计量的量度，适用于在MTBI之后寻求治疗的成年人。建议将我们的序数到区间分数转换表用于将来研究MTBI结果的研究。结论：WHODAS 2.0（12个条目的版本）是对MTBI后寻求治疗的成年人进行功能结局的心理测验。建议将我们的序数到区间分数转换表用于将来研究MTBI结果的研究。结论：WHODAS 2.0（12个项目的版本）是对MTBI之后寻求治疗的成年人进行功能结局的心理测验。建议将我们的序数到区间分数转换表用于将来研究MTBI结果的研究。