Original scientific paper

https://doi.org/10.20471/acc.2023.62.01.10

Is Lymphopenia a Predictor of Mortality in Patients with COVID-19?

Jehat Kılıc ; SBÜ Diyarbakır Gazi Yaşargil EAH, Internal Medicine Department, Diyarbakır, Turkey
Berat Ebik orcid.org/0000-0002-0012-2505 ; SBÜ Diyarbakır Gazi Yaşargil Education Hospital, Department of Gastroenterology, Diyarbakır, Turkey
Ferhat Bacaksız ; SBÜ Diyarbakır Gazi Yaşargil Education Hospital, Department of Gastroenterology, Diyarbakır, Turkey
Nazım Ekin ; SBÜ Diyarbakır Gazi Yaşargil Education Hospital, Department of Gastroenterology, Diyarbakır, Turkey
Burhan Sami Kalın ; SBÜ Diyarbakır Gazi Yaşargil Education Hospital, Department of Intensive Care, Diyarbakır, Turkey

Abstract

In this study, we evaluated the relation between the presence of lymphopenia and
the need of intensive care unit (ICU) or mortality. A total of 1670 COVID-19 patients were divided according
to the severity of lymphopenia developing at the time of COVID-19 infection. According to the
symptoms and need of ICU, the infection was classified as mild or severe. The rates of severe infection,
ICU admission, and mortality were evaluated between the groups. Among 1670 patients, 576 (34.4%)
patients had severe disease and 1094 (65.6%) patients had a mild form of the disease; 213 (12.7%) patients
with severe COVID-19 died. The severe form of COVID-19 was more common in patients with
low lymphocyte levels (<500) than in those with normal lymphocytes count (64.7% vs. 5.2%; p<0.001).
The odds ratio of lymphopenic patients was 2.4 (1.8-3.0; p=0.001). The risk of severe COVID-19 infection
and mortality was 8.9 and 12.4 times higher in patients with low lymphocyte count compared
to patients with normal lymphocyte count subsequently. ROC analysis showed that lymphocyte counts
lower than 615 lym/mcL had 96.4% sensitivity for severe disease (AUC:0.89 (0.842-0.938); p<0.001).
There was a significant negative correlation between lymphocyte count and mortality rate and severe
COVID-19 disease (for severe COVID-19 r=-0.590; p<0.001and for mortality r=-0.511; p=0.001). In
conclusion, we found a strong correlation between lymphopenia and COVID-19 outcomes. Lymphopenia
in patients with COVID-19 was a prognostic factor in the course of the disease. Lymphopenia is
an easy and inexpensive prognostic factor that can be used in the management of COVID-19 patients.

Keywords

COVID-19; Lymphopenia; Mortality

Hrčak ID:

307167

URI

https://hrcak.srce.hr/307167

Publication date:

1.4.2023.

Article data in other languages: croatian

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