Diabetes mellitus, maternal adiposity, and insulin-dependent gestational diabetes are associated with COVID-19 in pregnancy: the INTERCOVID study

Brenda Eskenazi, Stephen Rauch, Enrico Iurlaro, Robert B. Gunier, Albertina Rego, Michael G. Gravett, Paolo Ivo Cavoretto, Philippe Deruelle, Perla K. García-May, Mohak Mhatre, Mustapha Ado Usman, Mohamed Elbahnasawy, Saturday Etuk, Raffaele Napolitano, Sonia Deantoni, Becky Liu, Federico Prefumo, Valeria Savasi, Patrícia F. Marques, Eric BaafiGhulam Zainab, Ricardo Nieto, Berta Serrano, Muhammad Baffah Aminu, Jorge Arturo Cardona-Perez, Rachel Craik, Adele Winsey, Gabriela Tavchioska, Babagana Bako, Daniel Oros, Caroline Benski, Hadiza Galadanci, Mónica Savorani, Manuela Oberto, Loïc Sentilhes, Milagros Risso, Ken Takahashi, Carmen Vecciarelli, Satoru Ikenoue, Anil K. Pandey, Constanza P. Soto Conti, Irene Cetin, Vincent Bizor Nachinab, Ernawati Ernawati, Eduardo A. Duro, Alexey Kholin, Michelle L. Firlit, Sarah Rae Easter, Joanna Sichitiu, Yetunde John-Akinola, Roberto Casale, Hellas Cena, Josephine Agyeman-Duah, Paola Roggero, Ana Langer, Zulfiqar A. Bhutta, Stephen H. Kennedy, Jose Villar, Aris T. Papageorghiou

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Among nonpregnant individuals, diabetes mellitus and high body mass index increase the risk of COVID-19 and its severity. Objective: This study aimed to determine whether diabetes mellitus and high body mass index are risk factors for COVID-19 in pregnancy and whether gestational diabetes mellitus is associated with COVID-19 diagnosis. Study Design: INTERCOVID was a multinational study conducted between March 2020 and February 2021 in 43 institutions from 18 countries, enrolling 2184 pregnant women aged ≥18 years; a total of 2071 women were included in the analyses. For each woman diagnosed with COVID-19, 2 nondiagnosed women delivering or initiating antenatal care at the same institution were also enrolled. The main exposures were preexisting diabetes mellitus, high body mass index (overweight or obesity was defined as a body mass index ≥25 kg/m2), and gestational diabetes mellitus in pregnancy. The main outcome was a confirmed diagnosis of COVID-19 based on a real-time polymerase chain reaction test, antigen test, antibody test, radiological pulmonary findings, or ≥2 predefined COVID-19 symptoms at any time during pregnancy or delivery. Relationships of exposures and COVID-19 diagnosis were assessed using generalized linear models with a Poisson distribution and log link function, with robust standard errors to account for model misspecification. Furthermore, we conducted sensitivity analyses: (1) restricted to those with a real-time polymerase chain reaction test or an antigen test in the last week of pregnancy, (2) restricted to those with a real-time polymerase chain reaction test or an antigen test during the entire pregnancy, (3) generating values for missing data using multiple imputation, and (4) analyses controlling for month of enrollment. In addition, among women who were diagnosed with COVID-19, we examined whether having gestational diabetes mellitus, diabetes mellitus, or high body mass index increased the risk of having symptomatic vs asymptomatic COVID-19. Results: COVID-19 was associated with preexisting diabetes mellitus (risk ratio, 1.94; 95% confidence interval, 1.55–2.42), overweight or obesity (risk ratio, 1.20; 95% confidence interval, 1.06–1.37), and gestational diabetes mellitus (risk ratio, 1.21; 95% confidence interval, 0.99–1.46). The gestational diabetes mellitus association was specifically among women requiring insulin, whether they were of normal weight (risk ratio, 1.79; 95% confidence interval, 1.06–3.01) or overweight or obese (risk ratio, 1.77; 95% confidence interval, 1.28–2.45). A somewhat stronger association with COVID-19 diagnosis was observed among women with preexisting diabetes mellitus, whether they were of normal weight (risk ratio, 1.93; 95% confidence interval, 1.18–3.17) or overweight or obese (risk ratio, 2.32; 95% confidence interval, 1.82–2.97). When the sample was restricted to those with a real-time polymerase chain reaction test or an antigen test in the week before delivery or during the entire pregnancy, including missing variables using imputation or controlling for month of enrollment, the observed associations were comparable. Conclusion: Diabetes mellitus and overweight or obesity were risk factors for COVID-19 diagnosis in pregnancy, and insulin-dependent gestational diabetes mellitus was associated with the disease. Therefore, it is essential that women with these comorbidities are vaccinated.

Original languageEnglish
JournalAmerican Journal of Obstetrics and Gynecology
DOIs
Publication statusAccepted/In press - 2022

Keywords

  • COVID-19
  • SARS-CoV-2
  • body mass index
  • diabetes mellitus
  • gestational diabetes mellitus
  • obesity
  • overweight
  • pregnancy

ASJC Scopus subject areas

  • Obstetrics and Gynaecology

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