eb9cde1bf5169bc7944259d587dfb87e pmc_33321977.pdf c8b63d32767301d0161a4e452947eda685ea2433 pmc_33321977.pdf fe4258bc94ec5822578cb725371fc737854f1dd436d78d8b9226b31397fecc2c pmc_33321977.pdf Title: Multimorbidity Patterns and Unplanned Hospitalisation in a Cohort of Older Adults Subject: The presence of multiple chronic conditions (i.e., multimorbidity) increases the risk of hospitalisation in older adults. We aimed to examine the association between different multimorbidity patterns and unplanned hospitalisations over 5 years. To that end, 2,250 community-dwelling individuals aged 60 years and older from the Swedish National Study on Aging and Care in Kungsholmen (SNAC-K) were studied. Participants were grouped into six multimorbidity patterns using a fuzzy c-means cluster analysis. The associations between patterns and outcomes were tested using Cox models and negative binomial models. After 5 years, 937 (41.6%) participants experienced at least one unplanned hospitalisation. Compared to participants in the unspecific multimorbidity pattern, those in the cardiovascular diseases, anaemia and dementia pattern, the psychiatric disorders pattern and the metabolic and sleep disorders pattern presented with a higher hazard of first unplanned hospitalisation (hazard ratio range: 1.49–2.05; p < 0.05 for all), number of unplanned hospitalisations (incidence rate ratio (IRR) range: 1.89–2.44; p < 0.05 for all), in-hospital days (IRR range: 1.91–3.61; p < 0.05 for all), and 30-day unplanned readmissions (IRR range: 2.94–3.65; p < 0.05 for all). Different multimorbidity patterns displayed a differential association with unplanned hospital care utilisation. These findings call for a careful primary care follow-up of older adults with complex multimorbidity patterns. Keywords: hospitalisation; multimorbidity; older adults; person-centred care Author: Roselyne Akugizibwe, Amaia Calderón-Larrañaga, Albert Roso-Llorach, Graziano Onder, Alessandra Marengoni, Alberto Zucchelli, Debora Rizzuto and Davide L. 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