Development and Testing of the Foot Care Scale for Older Japanese Diabetic Patients

Abstract

We aimed to develop and test the reliability and validity of a foot care self-management assessment tool for older Japanese patients with diabetes. In this cross-sectional observational study, which was carried out according to the Strengthening the Reporting of Observational Studies in Epidemiology guidelines, additional items were developed and selected to reflect older Japanese patients’ needs a thorough investigation with experts in diabetes and geriatrics. A total of 200 older patients with diabetes in a foot care outpatient clinic were included in the study to finalize the scale items and verify the scale's reliability and validity. A factor analysis yielded a 4-factor, 9-item scale. Factors 1 to 4 were “skin condition” (3 items), “nail clipping” (2 items), “attention to wounds” (2 items), and “relationships with others” (2 items). The Cronbach's α coefficients for the 4 factors were .852, .900, .820, and .571, respectively. The overall scale was 0.797, indicating good internal consistency. Spearman's correlation coefficients for each of the 4 factors with the scale's total score showed good stability; all correlations were significant. In Japan's super-aged society, it is important to focus on foot care practices among older adults and to promote good foot care practices among early older adults so that they can practice self-care at home. Therefore, a scale for comprehensively evaluating foot care in elderly patients with diabetes is needed. The Foot Care Scale for Older Diabetics could be useful as a tool for assessing the ability to self-manage foot care in older Japanese patients with diabetes.