TY - JOUR
T1 - Risk factors for and pregnancy outcomes after SARS-CoV-2 in pregnancy according to disease severity
T2 - A nationwide cohort study with validation of the SARS-CoV-2 diagnosis
AU - Aabakke, Anna J. M.
AU - Petersen, Tanja G.
AU - Wøjdemann, Karen
AU - Ibsen, Mette H.
AU - Jonsdottir, Fjola
AU - Rønneberg, Elisabeth
AU - Andersen, Charlotte S.
AU - Hammer, Anne
AU - Clausen, Tine D.
AU - Milbak, Julie
AU - Burmester, Lars
AU - Zethner, Rikke
AU - Lindved, Birgitte
AU - Thorsen-Meyer, Annette
AU - Khalil, Mohammed R.
AU - Henriksen, Birgitte
AU - Jønsson, Lisbeth
AU - Andersen, Lise L. T.
AU - Karlsen, Kamilla K.
AU - Pedersen, Monica L.
AU - Hedermann, Gitte
AU - Vestgaard, Marianne
AU - Thisted, Dorthe
AU - Fallesen, Agnethe N.
AU - Johansson, Josephine N.
AU - Møller, Ditte C.
AU - Dubietyte, Greta
AU - Andersson, Charlotte B.
AU - Farlie, Richard
AU - Skaarup Knudsen, Ane-Kersti
AU - Hansen, Lea
AU - Hvidman, Lone
AU - Sørensen, Anne N.
AU - Rathcke, Sidsel L.
AU - Rubin, Katrine H.
AU - Petersen, Lone K.
AU - Jørgensen, Jan S.
AU - Krebs, Lone
AU - Bliddal, Mette
N1 - © 2023 The Authors. Acta Obstetricia et Gynecologica Scandinavica published by John Wiley & Sons Ltd on behalf of Nordic Federation of Societies of Obstetrics and Gynecology (NFOG).
PY - 2023/3
Y1 - 2023/3
N2 - Introduction: We identified risk factors and outcomes associated with SARS-CoV-2 infection in pregnancy in a universally tested population according to disease severity and validated information on SARS-CoV-2 during pregnancy in national health registers in Denmark. Material and methods: Cohort study using data from national registers and medical records including all pregnancies between March 1, 2020 and February 28, 2021. We compared women with a validated positive SARS-CoV-2 test during pregnancy with non-infected pregnant women. Risk factors and pregnancy outcomes were assessed by Poisson and Cox regression models and stratified according to disease severity defined by hospital admission status and admission reason (COVID-19 symptoms or other). Using medical record data on actual period of pregnancy, we calculated predictive values of the SARS-CoV-2 diagnosis in pregnancy in the registers. Results: SARS-CoV-2 infection was detected in 1819 (1.6%) of 111 185 pregnancies. Asthma was associated with infection (relative risk [RR] 1.63, 95% confidence interval [CI] 1.28–2.07). Risk factors for severe COVID-19 disease requiring hospital admission were high body mass index (median ratio 1.06, 95% CI 1.04–1.09), asthma (RR 7.47, 95% CI 3.51–15.90) and gestational age at the time of infection (gestational age 28–36 vs < 22: RR 3.53, 95% CI 1.75–7.10). SARS-CoV-2-infected women more frequently had hypertensive disorders in pregnancy (adjusted hazard ratio [aHR] 1.31, 95% CI 1.04–1.64), early pregnancy loss (aHR 1.37, 95% CI 1.00–1.88), preterm delivery before gestational age 28 (aHR 2.31, 95% CI 1.01–5.26), iatrogenically preterm delivery before gestational age 37 (aHR 1.49, 95% CI 1.01–2.19) and small-for-gestational age children (aHR 1.28, 95% CI 1.05–1.54). The associations were stronger among women admitted to hospital for any reason. The validity of the SARS-CoV-2 diagnosis in relation to pregnancy in the registers compared with medical records showed a negative predictive value of 99.9 (95% CI 99.9–100.0) and a positive predictive value of 82.1 (95% CI 80.4–83.7). Conclusions: Women infected with SARS-CoV-2 during pregnancy were at increased risk of hypertensive disorders in pregnancy, early pregnancy loss, preterm delivery and having children small for gestational age. The validity of Danish national registers was acceptable for identification of SARS-CoV-2 infection during pregnancy.
AB - Introduction: We identified risk factors and outcomes associated with SARS-CoV-2 infection in pregnancy in a universally tested population according to disease severity and validated information on SARS-CoV-2 during pregnancy in national health registers in Denmark. Material and methods: Cohort study using data from national registers and medical records including all pregnancies between March 1, 2020 and February 28, 2021. We compared women with a validated positive SARS-CoV-2 test during pregnancy with non-infected pregnant women. Risk factors and pregnancy outcomes were assessed by Poisson and Cox regression models and stratified according to disease severity defined by hospital admission status and admission reason (COVID-19 symptoms or other). Using medical record data on actual period of pregnancy, we calculated predictive values of the SARS-CoV-2 diagnosis in pregnancy in the registers. Results: SARS-CoV-2 infection was detected in 1819 (1.6%) of 111 185 pregnancies. Asthma was associated with infection (relative risk [RR] 1.63, 95% confidence interval [CI] 1.28–2.07). Risk factors for severe COVID-19 disease requiring hospital admission were high body mass index (median ratio 1.06, 95% CI 1.04–1.09), asthma (RR 7.47, 95% CI 3.51–15.90) and gestational age at the time of infection (gestational age 28–36 vs < 22: RR 3.53, 95% CI 1.75–7.10). SARS-CoV-2-infected women more frequently had hypertensive disorders in pregnancy (adjusted hazard ratio [aHR] 1.31, 95% CI 1.04–1.64), early pregnancy loss (aHR 1.37, 95% CI 1.00–1.88), preterm delivery before gestational age 28 (aHR 2.31, 95% CI 1.01–5.26), iatrogenically preterm delivery before gestational age 37 (aHR 1.49, 95% CI 1.01–2.19) and small-for-gestational age children (aHR 1.28, 95% CI 1.05–1.54). The associations were stronger among women admitted to hospital for any reason. The validity of the SARS-CoV-2 diagnosis in relation to pregnancy in the registers compared with medical records showed a negative predictive value of 99.9 (95% CI 99.9–100.0) and a positive predictive value of 82.1 (95% CI 80.4–83.7). Conclusions: Women infected with SARS-CoV-2 during pregnancy were at increased risk of hypertensive disorders in pregnancy, early pregnancy loss, preterm delivery and having children small for gestational age. The validity of Danish national registers was acceptable for identification of SARS-CoV-2 infection during pregnancy.
KW - COVID-19
KW - cohort studies
KW - obstetric delivery
KW - pregnancy complications
KW - pregnancy outcome
KW - prospective studies
KW - severe acute respiratory syndrome coronavirus 2
KW - validation study
UR - http://www.scopus.com/inward/record.url?scp=85147209957&partnerID=8YFLogxK
U2 - 10.1111/aogs.14512
DO - 10.1111/aogs.14512
M3 - Journal article
C2 - 36695168
SN - 0001-6349
VL - 102
SP - 282
EP - 293
JO - Acta Obstetricia et Gynecologica Scandinavica
JF - Acta Obstetricia et Gynecologica Scandinavica
IS - 3
ER -