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This study aimed to explore the association between dependency and cognitive function among older adults. A combined cross-sectional and longitudinal study was conducted in 26 locations in China. A total of 1160 participants aged ≥ 60 years were selected using a complex multistage sampling design, and 152 participants completed data collection after one year follow-up observation. A questionnaire was administered by face-to-face interviews. Dependency was measured using the standardized Chinese version of the Minnesota Multiphasic Personality Inventory-II. Logistic regression analysis was conducted to assess the association between dependency and cognitive function. Cox proportional hazards analysis was performed to identify causality between cognition function and dependency. The results of logistic regression analysis showed that the orientation and outdoor instrumental activities of daily living (IADL) domains were significantly associated with dependency, with odds ratios of 1.45 (95% CI, 1.26–1.67; p < 0.001) and 1.16 (95% CI, 1.06–1.26; p < 0.001), respectively. In the Cox proportional hazards analysis, the DASC-21 score was significantly associated with dependency, with hazard ratio of 1.32 (95% CI, 1.03–1.69). The causality between cognition impairment and dependency was identified, and the orientation and outdoor IADL domains were significantly associated with dependency. [ABSTRACT FROM AUTHOR]

Background: Long sleep duration is a common sleep disorder among elderly people. Dependency increases with increasing age. This study aimed to assess the association between dependency and long sleep duration among elderly people. Methods: This study is a population‐based cross‐sectional study. A total of 1152 participants aged ≥ 60 years were selected from 26 locations in China by a complex multistage sampling design. Data were collected through face‐to‐face interviews. Sleep duration was measured using the Pittsburgh Sleep Quality Index. Dependency was assessed using Minnesota Multiphasic Personality Inventory‐II. Hierarchical multiple linear regression analysis was used to evaluate the efficacy of sleep‐related factors and psychological factors for sleep duration. Analysis of covariance and logistic regression analysis were performed to evaluate the association between the dependency score and sleep duration, and the strength of dependency effect on sleep duration. Results: A total of 1120 participants were valid for the analysis. Among them, 15.8% of participants had a dependency score ≥60 points. The results of hierarchical multiple linear regression analysis showed that sleep duration was positively associated with dependency scores. Analysis of covariance indicated a J‐shaped association between dependency scores and sleep duration. The results of logistic regression analysis showed dependency was significantly associated with long sleep duration, and the odds ratio was 3.52 (95% CI, 1.87–6.63; P < 0.001). Conclusion: Dependency was significantly associated with long sleep duration among elderly people. The results suggested that dependent intervention may be a strategy that needs urgent implementation to reduce long sleep duration among elderly people. [ABSTRACT FROM AUTHOR]

Aim: The objective of this study was to verify the reliability and validity of the Dementia Assessment Sheet for Community‐based Integrated Care System 21 items (DASC‐21) among Chinese community‐dwelling older adults, and to explore the related factors for dementia screening. Methods: The study adopted a cross‐sectional design, and a total of 1152 participants aged ≥60 years were recruited from 26 locations in China. All data were collected using questionnaires through face‐to‐face interviews. The logistic regression model was used to evaluate the effect factors of DASC‐21 for dementia screening. The receiver operating characteristic curves were used to determine the optimal cut‐off points and the accuracy of the DASC‐21 for dementia and mild cognitive impairment screening. Results: For test–retest reliability, the Pearson correlation coefficient was 0.873 (P < 0.001). In the criterion‐related validity, the DASC‐21 scores were significantly and negatively correlated with the Mini‐Mental State Examination (r = −0.663, P < 0.001) and the Montreal Cognitive Assessment (r = −0.565, P < 0.001) scores. The results of the receiver operating characteristic analysis showed that there were different optimal cut‐off values for different age groups. The areas under the receiver operating characteristic curves were 95.6% and 90.3% for dementia and mild cognitive impairment screening using DASC‐21 after considering related effect factors. Conclusions: The DASC‐21 was confirmed to be a valid and reliable instrument for dementia screening among Chinese community‐dwelling older adults. Our results suggested that the age, education level and 2‐week prevalence were important effect factors for dementia screening using the DASC‐21. Geriatr Gerontol Int 2021; 21: 705–711. [ABSTRACT FROM AUTHOR]