Weekend Effect and in-Hospital Mortality in Elderly Patients with Acute Kidney Injury: A Retrospective Analysis of a National Hospital Database in Italy.

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Weekend Effect and in-Hospital Mortality in Elderly Patients with Acute Kidney Injury: A Retrospective Analysis of a National Hospital Database in Italy.

J Clin Med. 2020 Jun 11;9(6):

Authors: Fabbian F, De Giorgi A, Di Simone E, Cappadona R, Lamberti N, Manfredini F, Boari B, Storari A, Manfredini R

Abstract
BACKGROUND: The aim of this study was to relate the weekend (WE) effect and acute kidney injury (AKI) in elderly patients by using the Italian National Hospital Database (NHD).
METHODS: Hospitalizations with AKI of subjects aged ≥ 65 years from 2000-2015 who were identified by the ICD-9-CM were included. Admissions from Friday to Sunday were considered as WE, while all the other days were weekdays (WD). In-hospital mortality (IHM) was our outcome, and the comorbidity burden was calculated by the modified Elixhauser Index (mEI), based on ICD-9-CM codes.
RESULTS: 760,664 hospitalizations were analyzed. Mean age was 80.5 ± 7.8 years and 52.2% were males. Of the studied patients, 9% underwent dialysis treatment, 24.3% were admitted during WE, and IHM was 27.7%. Deceased patients were more frequently comorbid males, with higher age, treated with dialysis more frequently, and had higher admission during WE. WE hospitalizations were more frequent in males, and in older patients with higher mEI. IHM was independently associated with dialysis-dependent AKI (OR 2.711; 95%CI 2.667-2.755, p < 0.001), WE admission (OR 1.113; 95%CI 1.100-1.126, p < 0.001), and mEI (OR 1.056; 95% CI 1.055-1.057, p < 0.001).
DISCUSSION: Italian elderly patients admitted during WE with AKI are exposed to a higher risk of IHM, especially if they need dialysis treatment and have high comorbidity burden.

PMID: 32545203 [PubMed]

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