AbstractBackgroundThe Dementia Assessment Sheet for Community‐based Integrated Care System‐21 items (DASC‐21) was developed as screening tool to find early dementia. Although it is assessed by trained staff, self‐reported use has expected in community setting. The aim of this study was to examine usefulness to use the self‐reported DASC‐21 in the community dwelling‐elderly.MethodThis study design was cross sectional. We examined 2,140 elderly (≥65 years, mean age: 72.2 ± 4.6 years, females: 1,096) who were registered at Tanba city (Japanese rural area) and attended special health check‐up in 2019. DASC‐21 consisted of 21 items including institutional or basic activity of daily living and cognitive function and each item was indicated by 4‐points scale (21 to 84, ≥31 indicates dementia). Locomotive disorders (LD) were assessed by Geriatric Locomotive Function Scale‐25, which consisted of 25 items and response was graded into a 5‐point scale (0 to 100, ≥7 and ≥16 indicate pre‐LD and LD). Social frailty (SF) was examined using 5 items yes or no questions (0 to 5, 1 and ≥2 indicate SF). Depression was examined using Geriatric Depression Scale (0 to 15, ≥5 and ≥10 indicate moderate and severe depression). We also identified hypertension (systolic blood pressure ≥140mmHg and/or diastolic blood pressure ≥90mmHg), dyslipidemia (serum triglycerides ≥150mg/dL), and hyperglycemia (HbA1c ≥6.5%) from annual health check‐up. We performed statistical analyses using logistic regression, with the presence of dementia as the dependent variable, the presence of LD, SF, depression, hypertension, dyslipidemia, or hyperglycemia as the independent variable, and age, sex and years of education as confounding variables.ResultOf them, 100 participants were identified by DASC‐21 as dementia. In logistic regression analysis, the presence of dementia was associated with the presence of LD [odds ratio (95%CI), 4.2 (2.5 – 7.2) and 10.2 (5.8 – 17.9)], SF [3.7 (2.1 – 6.8) and 9.7 (5.4 – 17.4)], and depression [3.8 (2.5 – 6.0) and 8.5 (4.2 – 17.2)]. However, the other variables were not related.ConclusionUsing self‐reported DASC‐21 in the community‐dwelling elderly included various symptoms.