Validating care‐needs level against self‐reported measures of functioning, disability and sarcopenia among Japanese patients receiving home medical care: The Zaitaku Evaluative Initiatives and Outcome Study

Abstract

Aim This study aimed to examine the validity of the care‐needs levels classified in Japan's long‐term care insurance system (LTCI‐CNLs) when compared with patients’ self‐perceived functioning, disability and physical performance among patients receiving home medical care. Methods This was a multicenter cross‐sectional study in Japan. Patients who were receiving continuous home medical care and who could respond to the questionnaire were enrolled in this study. In addition to the LTCI‐CNLs, the 12‐item version of the World Health Organization Disability Assessment Schedule 2.0 (WHODAS 2.0) and the SARC‐F were used to measure functioning, disability and physical performance (sarcopenia). In addition, correlations and associations of the LTCI‐CNLs with the WHODAS 2.0 and SARC‐F were analyzed using Spearman correlations and linear mixed models. Results Data from 181 patients were included in the analyses. The LTCI‐CNLs varied, ranging from support level 1 (5.5%) to care‐needs level 5 (10.5%), with care‐needs level 2 being the most prevalent (24.9%). Moderate correlations of the LTCI‐CNLs with the WHODAS 2.0 and SARC‐F were found (ρ = 0.58 and 0.44, respectively). Although WHODAS 2.0 and SARC‐F scores varied within each LTCI‐CNL, predicted WHODAS 2.0 and SARC‐F scores increased as LTCI‐CNL increased. Dementia was not associated with WHODAS 2.0 or SARC‐F. Conclusions The LTCI‐CNLs was associated with self‐reported functioning, disability and physical performance among home medical care patients. Future studies can use the LTCI‐CNLs as an outcome variable for specific care approaches or as a proxy covariate for casemix status. Geriatr Gerontol Int 2021; ••: ••–••.