Tait R C, Pollard C A, Margolis R B, Duckro P N, Krause S J
Arch Phys Med Rehabil. 1987 Jul;68(7):438-41.
The Pain Disability Index (PDI) is a brief instrument that was developed to assess pain-related disability, providing information that complements assessment of physical impairment. This paper presents the results of two studies concerning the psychometric properties and the validity of the PDI. In study I, PDI scores of 108 patients appeared internally consistent (alpha = .86), although a factor analysis revealed two factors. The first factor (59.3% of variance) seemed to include more discretionary, less obligatory activities. The second factor (14.3% of variance) included activities more basic to daily living and survival. Study II found that the PDI scores of 37 former inpatients were significantly higher than 36 former outpatients who responded to a follow-up questionnaire. These findings support the validity of the PDI. Several methodologic issues are discussed, and suggestions are made for future uses of the instrument.
疼痛残疾指数（PDI）是一种简短的工具，旨在评估与疼痛相关的残疾情况，提供补充身体损伤评估的信息。本文介绍了两项关于PDI心理测量特性和效度的研究结果。在研究I中，108名患者的PDI评分显示出内部一致性（α = 0.86），尽管因子分析揭示了两个因子。第一个因子（占方差的59.3%）似乎包括更多可自由支配、较少强制性的活动。第二个因子（占方差的14.3%）包括对日常生活和生存更基本的活动。研究II发现，37名 former inpatients（原文此处有误，可能是former inpatients，即 former patients）的PDI评分显著高于对随访问卷做出回应的36名 former outpatients（原文此处有误，可能是former outpatients，即 former patients）。这些发现支持了PDI的效度。文中讨论了几个方法学问题，并对该工具的未来使用提出了建议。
