1977 Multimorbidity patterns and aged residential care admissions in Aotearoa New Zealand

Abstract

Abstract Introduction Multimorbidity is complex and impacts patients' quality of life, health outcomes, and health care utilisation. This project aims to identify multimorbidity patterns and their impact on long-term care admissions in community-dwelling older adults. Methods Multimorbidity was ascertained using primary care data Tū Ora COMPASS Health. Adults aged 65+ (55+ for Māori and Pasifika) were included in the analysis. Aged residential care (ARC) admission was determined from interRAI. Twelve conditions ascertained were hypertension, ischaemia, congestive heart failure, stroke, diabetes, cancer, chronic obstructive pulmonary disease, depression, hypothyroid, osteoporosis, dementia, and neurological diseases. Latent class analyses were completed to identify multimorbidity patterns by ethnicity, i.e., Māori, Pasifika, and non-Māori/non-Pasifika (nMP). For the latter group, analyses were also completed by age groups (<80 years and ≥80 years. Cox-regression models were used to examine the association between multimorbidity patterns and 5-year ARC admission. Results The sample comprises 45,178 older adults: nMP (88%), Māori (8%), and 1,755 Pasifika (4%). The average age for Māori and Pasifika was 65.1, respectively, and nMP was 74.1. We identified three multimorbidity patterns for Māori and Pasifika, and four for nMP (<80 and ≥80). All twelve conditions clustered differently in these samples. Eleven-per-cent Māori were in a 'complex-cluster', and they had a three times higher risk of ARC admission than 'healthier-cluster' [aHR(95%CI): 2.96 (1.81-4.36)]. We did not observe an association between condition clusters and ARC admission risk in the Pasifika sample. In the nM/nP<80y sample, those in 'complex-cluster' (4%) had a 5.5 times higher risk of ARC admission (5.48, 4.68-6.41) than in the 'healthier-cluster'; a similar association was observed in nM/nP≥80y in 'complex-cluster' (8%) when compared to 'healthier-cluster' (4.08, 3.67-4.53). Conclusions Complex clusters were associated with an increased risk of five-year ARC admission. Multimorbidity patterns are helpful for a more strategic approach to managing multimorbidity better in primary care settings.