Association between the red cell distribution width and mortality in elderly patients with non-traumatic coma: An observational cohort study

Author:

Kim Dongki1,Lee Donghun12ORCID,Lee Jiho1,Lee Byungkook12,Ko Sang Won1

Affiliation:

1. Department of Emergency Medicine, Chonnam National University Hospital, Gwangju, Republic of Korea

2. Department of Emergency Medicine, Chonnam National University Medical School, Gwangju, Republic of Korea.

Abstract

Elevated red blood cell distribution width (RDW) can be associated with disease severity. However, studies on RDW for the prognosis of elderly patients with non-traumatic coma (NTC) are lacking. This study aims to examine the relationship between RDW and outcomes in elderly patients with NTC. This observational cohort study included elderly patients (aged ≥ 65 years) with NTC between January 2022 and December 2022. We measured RDW upon patient arrival at the emergency department (ED). We conducted a multivariable analysis using logistic regression of relevant covariates to predict in-hospital mortality. Survival curves based on 30-day mortality were designed using the Kaplan–Meier method. The primary outcome was in-hospital mortality, and the secondary outcome was 30-day mortality. A total of 689 patients were included in the study, and in-hospital mortality was 29.6% (n = 204). Our results found that the RDWs of non-survivors were significantly greater than those of survivors (14.6% vs 13.6%). Multivariable analysis showed that RDWs at ED arrival were independently associated with in-hospital mortality (odds ratio, 1.126; 95% confidence interval, 1.047–1.212; P < .001). The Kaplan–Meier curve indicated that the survival probability of patients with a low RDW was greater than those with a high RDW. Having a high RDW at ED arrival was associated with in-hospital mortality in elderly patients with NTC.

Publisher

Ovid Technologies (Wolters Kluwer Health)

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