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Aims: To investigate the change and associated factors of care needs within 6 months post-discharge in older people with hospital-associated disability, and the relationship between time-varying care needs and physical function.Background: Older people with hospital-associated disability will have various care needs post-discharge. Understanding their care needs will help to improve their health. However, studies on this population are still limited.Design: A longitudinal study. Methods:The older people who met the inclusion and exclusion criteria were selected in 2 tertiary hospitals in Zhejiang Province, China. The questionnaire survey method was used to collect data about socio-demographic characteristics, physical function and care needs. The data of 375 older people who completed follow-up were analysed using logistic regression analysis, generalised estimating equations and generalised additive mixed model. We followed STROBE checklist for reporting the study. Results:The care needs of the older people with hospital-associated disability declined unevenly, it decreased rapidly in the first three months, and then flattening out. The percentage of people with care needs in each dimension decreased over time, but daily care and rehabilitation needs were consistently more important. Sociodemographic factors and physical function had different effects on need at different time points, the physical function was the main factor among them. There were non-linear relationships between the physical function and different care needs with different inflection points. Conclusion:This research revealed change patterns of the care needs of older people with hospital-associated disability post-discharge and the non-linear relationship between physical function and care needs. These findings may help healthcare professionals and caregivers to provide accurate care.

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