Budiman-Mak E, Conrad K J, Roach K E
General Medical Section, Ambulatory Care Service, VA Hines Hospital, IL 60141.
J Clin Epidemiol. 1991;44(6):561-70. doi: 10.1016/0895-4356(91)90220-4.
A Foot Function Index (FFI) was developed to measure the impact of foot pathology on function in terms of pain, disability and activity restriction. The FFI is a self-administered index consisting of 23 items divided into 3 sub-scales. Both total and sub-scale scores are produced. The FFI was examined for test-retest reliability, internal consistency, and construct and criterion validity. A total of 87 patients with rheumatoid arthritis were used in the study. Test-retest reliability of the FFI total and sub-scale scores ranged from 0.87 to 0.69. Internal consistency ranged from 0.96 to 0.73. With the exception of two items, factor analysis supported the construct validity of the total index and the sub-scales. Strong correlation between the FFI total and sub-scale scores and clinical measures of foot pathology supported the criterion validity of the index. The FFI should prove useful for both clinical and research purposes.
足部功能指数（FFI）旨在衡量足部病变在疼痛、残疾和活动受限方面对功能的影响。FFI是一个自我评估指数，由23个项目组成，分为3个分量表。可得出总分和分量表得分。对FFI进行了重测信度、内部一致性、结构效度和效标效度检验。该研究共纳入87例类风湿性关节炎患者。FFI总分和分量表得分的重测信度在0.87至0.69之间。内部一致性在0.96至0.73之间。除两项外，因子分析支持总指数和分量表的结构效度。FFI总分和分量表得分与足部病变临床指标之间的强相关性支持了该指数的效标效度。FFI在临床和研究目的方面均应被证明是有用的。
