Abstract: Diabetes Care
Rachel Wong,1 Margaret Hall,1
Rohith Vaddavalli,2 Adit Anand,1
Neha Arora,3 Carolyn T. Bramante,4
Victor Garcia,1 Steven Johnson,5
Mary Saltz,1 Jena S. Tronieri,6
Yun Jae Yoo,1 John B. Buse,7,8 Joel Saltz,1
Joshua Miller,3 and Richard Moffitt,1
for the N3C Consortium*
OBJECTIVE
The purpose of the study is to evaluate the relationship between HbA1c and
severity of coronavirus disease 2019 (COVID-19) outcomes in patients with type 2
diabetes (T2D) with acute COVID-19 infection.
RESEARCH DESIGN AND METHODS
We conducted a retrospective study using observational data from the National
COVID Cohort Collaborative (N3C), a longitudinal, multicenter U.S. cohort of
patients with COVID-19 infection. Patients were ‡18 years old with T2D and confirmed COVID-19 infection by laboratory testing or diagnosis code. The primary
outcome was 30-day mortality following the date of COVID-19 diagnosis. Secondary outcomes included need for invasive ventilation or extracorporeal membrane
oxygenation (ECMO), hospitalization within 7 days before or 30 days after
COVID-19 diagnosis, and length of stay (LOS) for patients who were hospitalized.
RESULTS
The study included 39,616 patients (50.9% female, 55.4% White, 26.4% Black or
African American, and 16.1% Hispanic or Latino, with mean ± SD age 62.1 ± 13.9
years and mean ± SD HbA1c 7.6% ± 2.0). There was an increasing risk of hospitalization with incrementally higher HbA1c levels, but risk of death plateaued at
HbA1c >8%, and risk of invasive ventilation or ECMO plateaued >9%. There was
no significant difference in LOS across HbA1c levels.
CONCLUSIONS
1
Department of Biomedical Informatics, Stony
Brook University, Stony Brook, NY
2
Department of Computer Science, Stony Brook
University, Stony Brook, NY
3
Division of Endocrinology and Metabolism,
Department of Medicine, Renaissance School
of Medicine at Stony Brook University, Stony
Brook, NY
4
Division of General Internal Medicine,
University of Minnesota Medical School,
Minneapolis, MN
5
Institute for Health Informatics, University of
Minnesota, Minneapolis, MN
6
Department of Psychiatry, Perelman School of
Medicine at the University of Pennsylvania,
Philadelphia, PA
7
Division of Endocrinology and Metabolism,
Department of Medicine, University of North
Carolina School of Medicine, Chapel Hill, NC
8
North Carolina Translational and Clinical
Sciences Institute, University of North Carolina
School of Medicine, Chapel Hill, NC
Corresponding author: Rachel Wong, rachel.
wong@stonybrookmedicine.edu
Received 20 October 2021 and accepted 28
January 2022
This article contains supplementary material online
at https://doi.org/10.2337/figshare.19119302.
In a large, multicenter cohort of patients in the U.S. with T2D and COVID-19 infection, risk of hospitalization increased with incrementally higher HbA1c levels. Risk
of death and invasive ventilation also increased but plateaued at different levels
of glycemic control.
J.M. and R.M. contributed equally.
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has claimed >4 million lives worldwide since the first reported case of coronavirus disease-2019
(COVID-19) in December 2019 (1). Diabetes has been implicated as a risk factor for
increased mortality and morbidity in patients with COVID-19 infection, with a
higher prevalence of diabetes reported in patients with severe outcomes, including
© 2022 by the American Diabetes Association.
Readers may use this article as long as the
work is properly..
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' <jats:title>OBJECTIVE</jats:title>\n'
' <jats:p>The purpose of the study is to evaluate the relationship between '
'HbA1c and severity of coronavirus disease 2019 (COVID-19) outcomes in patients with type 2 '
'diabetes (T2D) with acute COVID-19 infection.</jats:p>\n'
' </jats:sec>\n'
' <jats:sec>\n'
' <jats:title>RESEARCH DESIGN AND METHODS</jats:title>\n'
' <jats:p>We conducted a retrospective study using observational data from '
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' <jats:title>RESULTS</jats:title>\n'
' <jats:p>The study included 39,616 patients (50.9% female, 55.4% White, '
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' <jats:sec>\n'
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' <jats:p>In a large, multicenter cohort of patients in the U.S. with T2D and '
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