ArticleFrontiers in clinical diabetes and healthcare2026
Characteristics and outcomes of diabetes emergencies in nonagenarians admitted to ICU: a binational retrospective cohort study.
Article in Frontiers in clinical diabetes and healthcare, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Nonagenarian patients admitted to Intensive Care Units (ICU) are expected to rise with an ageing population. However, diagnosis-specific data is lacking in this cohort to guide clinical decisions. This includes diabetic emergencies, namely hyperosmolar hyperglycemic state (HHS) and diabetic ketoacidosis (DKA), which carry substantial morbidity and mortality. We sought to determine the incidence, clinical characteristics, and outcomes of nonagenarians admitted to ICUs across Australia and New Zealand (ANZ) with DKA and HHS to provide foundations for evidence-based prognostication and resource allocation. Methods: We conducted a binational multi-center retrospective analysis of nonagenarian patients admitted to ANZ ICUs with DKA or HHS between 2018-2024. Data was sourced from the Australian and New Zealand Intensive Care Society Centre for Outcome and Resource Evaluation. Our primary outcome was to determine the incidence of nonagenarians ICU admissions for diabetic emergencies. Baseline characteristics, physiological and biochemical data, length-of-stay (LOS) and mortality were compared between groups. Multivariable regression models were used to explore associations between diagnosis, complications, interventions, and ICU and hospital LOS. Cox proportional hazards models assessed effects of diagnosis on ICU and hospital LOS, and mortality. Results: 19,078 nonagenarian patients were admitted to an ANZ ICU during the study period, and 86 (0.45%) were admitted with DKA (55 (64.0%)) or HHS (31 (36.0%)). Pre-admission diabetes related complications were more prevalent in HHS compared to DKA (100% vs 80%, P = 0.004), with no other significant differences in demographic, clinical and biochemical measures. DKA patients had significantly lower odds of developing AKI compared to HHS (adjusted OR 0.29, 95% CI 0.08 to 0.98; P = 0.046). ICU and hospital LOS did not differ significantly between groups. ICU mortality occurred in 1 (1.8%) DKA patient and 3 (9.7%) HHS patients, and in-hospital mortality in 7 (12.7%) and 6 (19.4%) patients, respectively. Survival over 48-months did not differ between groups (log-rank P = 0.790). Conclusion: Our findings suggest favourable outcomes can be achieved in suitable nonagenarians with reversible endocrine emergencies through ICU admission. We provide the first detailed description of this cohort, where future functional outcomes and quality of life assessment post-ICU admission could further inform triage decision-making.
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