In‐hospital mortality in SARS‐CoV‐2 stratified by hemoglobin levels: A retrospective study. Issue 3 (5th May 2021)

• Record Type: Journal Article
• Authors: Al‐Jarallah, Mohammed; Rajan, Rajesh; Saber, Ahmad Al; Pan, Jiazhu; Al‐Sultan, Ahmad T.; Abdelnaby, Hassan; Alroomi, Moudhi; Dashti, Raja; Aboelhassan, Wael; Almutairi, Farah; Abdullah, Mohammed; Alotaibi, Naser; Saleh, Mohammad Al; AlNasrallah, Noor; Al‐Bader, Bader; Malhas, Haya; Ramadhan, Maryam; Hamza, Mahdy; Zhanna, Kobalava D.
• Is Part Of: EJHaem. Volume 2:Issue 3(2021)
• Page Start: 335
• Page End: 339
• Publication Date: 2021-05-05
• Subjects: anemia -- COVID‐19 -- hemoglobin -- in‐hospital mortality -- SARS‐CoV‐2; Hematology -- Periodicals; 616.15
• DOI: 10.1002/jha2.195
• Languages: English
• ISSNs: 2688-6146

Abstract

Abstract: This study is to estimate in‐hospital mortality in severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) patients stratified by hemoglobin (Hb) level. Patients were stratified according to hemoglobin level into two groups, that is, Hb <100 g/L and Hb >100 g/L. A total of 6931 patients were included. Of these, 6377 (92%) patients had hemoglobin levels >100 g/L. The mean age was 44 ± 17 years, and 66% of the patients were males. The median length of overall hospital stay was 13 days [2; 31]. The remaining 554 (8%) patients had a hemoglobin level <100 g/L. Overall mortality was 176 patients (2.54%) but was significantly higher in the group with hemoglobin levels <100 g/L (124, 22.4%) than in the group with hemoglobin levels >100 g/L (52, 0.82%). Risk factors associated with increased mortality were determined by multivariate analysis. The Kaplan‐Meier survival analysis showed hemoglobin as a predictor of mortality. Cox proportional hazards regression coefficients for hemoglobin for the HB ≤ 100 category of hemoglobin were significant, B = 2.79, SE = 0.17, and HR = 16.34, p < 0.001. Multivariate logistic regression showed Hb < 100 g/L had a higher cumulative all‐cause in‐hospital mortality (22.4% vs. 0.8%; adjusted odds ratio [aOR], 0.33; 95% [CI]: [0.20–0.55]; p < 0.001). In this study, hemoglobin levels <100 g/L were found to be an independent predictor of in‐hospital mortality.