Risk of preterm birth, small for gestational age at birth, and stillbirth after covid-19 vaccination during pregnancy: population based retrospective cohort study br

被引：37

作者：

Fell, Deshayne B. ^{[1
,2
]}

Dimanlig-Cruz, Sheryll ^{[2
,3
]}

Regan, Annette K. ^{[4
,5
]}

Haberg, Siri E. ^{[6
]}

Gravel, Christopher A. ^{[2
,7
]}

Oakley, Laura ^{[6
,8
]}

Alton, Gillian D. ^{[1
,3
]}

Torok, Eszter ^{[1
,3
]}

Dhinsa, Tavleen ^{[3
]}

Shah, Prakesh S. ^{[9
,10
,11
,12
]}

Wilson, Kumanan ^{[13
,14
,15
]}

Sprague, Ann E. ^{[1
,3
]}

El-Chaar, Darine ^{[2
,13
,16
]}

Walker, Mark C. ^{[1
,2
,3
,13
,16
]}

Barrett, Jon ^{[17
]}

Okun, Nannette ^{[18
]}

Buchan, Sarah A. ^{[19
,20
]}

Kwong, Jeffrey C. ^{[19
,20
,21
,22
]}

Wilson, Sarah E. ^{[19
,20
]}

Dunn, Sandra, I ^{[3
,23
]}

MacDonald, Shannon E. ^{[24
,25
,26
]}

Dougan, Shelley D. ^{[1
,3
]}

机构：

[1] Childrens Hosp Eastern Ontario CHEO Res Inst, Ottawa, ON, Canada

[2] Univ Ottawa, Sch Epidemiol & Publ Hlth, Ottawa, ON, Canada

[3] Better Outcomes Registry & Network BORN Ontario, Ottawa, ON, Canada

[4] Univ San Francisco, Sch Nursing & Hlth Profess, San Francisco, CA USA

[5] Univ Calif Los Angeles, Fielding Sch Publ Hlth, Dept Epidemiol, Los Angeles, CA 90024 USA

[6] Norwegian Inst Publ Hlth, Ctr Fertil & Hlth, Oslo, Norway

[7] McGill Univ, Dept Epidemiol Biostat & Occupat Hlth, Montreal, PQ, Canada

[8] London Sch Hyg & Trop Med, Dept Epidemiol & Populat Hlth, London, England

[9] Mt Sinai Hosp, Dept Paediat, Toronto, ON, Canada

[10] Univ Toronto, Dept Paediat, Toronto, ON, Canada

[11] Mt Sinai Hosp, Maternal Infant Care Res Ctr, Dept Paediat, Toronto, ON, Canada

[12] Univ Toronto, Inst Hlth Policy Management & Evaluat, Toronto, ON, Canada

[13] Ottawa Hosp Res Inst, Clin Epidemiol Program, Ottawa, ON, Canada

[14] Univ Ottawa, Dept Med, Ottawa, ON, Canada

[15] Bruyere Res Inst, Ottawa, ON, Canada

[16] Univ Ottawa, Dept Obstet & Gynaecol, Ottawa, ON, Canada

[17] McMaster Univ, Dept Obstet & Gynaecol, Hamilton, ON, Canada

[18] Univ Toronto, Dept Obstet & Gynaecol, Toronto, ON, Canada

[19] Publ Hlth Ontario, Toronto, ON, Canada

[20] Univ Toronto, Dalla Lana Sch Publ Hlth, Toronto, ON, Canada

[21] ICES, Toronto, ON, Canada

[22] Univ Toronto, Dept Family & Community Med, Toronto, ON, Canada

[23] Univ Ottawa, Sch Nursing, Ottawa, ON, Canada

[24] Univ Alberta, Fac Nursing, Edmonton, AB, Canada

[25] Univ Alberta, Sch Publ Hlth, Edmonton, AB, Canada

[26] Univ Calgary, Dept Paediat, Calgary, AB, Canada

来源：

BMJ-BRITISH MEDICAL JOURNAL | 2022年 / 378卷

关键词：

HEALTH-CARE ORGANIZATIONS; UNITED-STATES;

D O I：

10.1136/bmj-2022-071416

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

OBJECTIVE To assess the risk of preterm birth, small for gestational age at birth, and stillbirth after covid-19 vaccination during pregnancy. DESIGN Population based retrospective cohort study.SETTING Ontario, Canada, 1 May to 31 December 2021. PARTICIPANTS All liveborn and stillborn infants from pregnancies conceived at least 42 weeks before the end of the study period and with gestational age a20 weeks or birth weight a500 g. MAIN OUTCOME MEASURES Using Cox regression, hazard ratios and 95% confidence intervals were estimated for preterm birth before 37 weeks (overall and spontaneous preterm birth), very preterm birth (< 32 weeks), small for gestational age at birth (< 10th centile), and stillbirth. Vaccination against covid-19 was treated as a time varying exposure in the outcome specific risk window, and propensity score weighting was used to adjust hazard ratios for potential confounding. RESULTS Among 85 162 births, 43 099 (50.6%) occurred in individuals who received one dose or more of a covid-19 vaccine during pregnancy-42 979 (99.7%) received an mRNA vaccine. Vaccination during pregnancy was not associated with any increased risk of overall preterm birth (6.5% among vaccinated v 6.9% among unvaccinated; adjusted hazard ratio 1.02, 95% confidence interval 0.96 to 1.08), spontaneous preterm birth (3.7% v 4.4%; 0.96, 0.90 to 1.03), or very preterm birth (0.59% v 0.89%; 0.80, 0.67 to 0.95). No increase was found in risk of small for gestational age at birth (9.1% v 9.2%; 0.98, 0.93 to 1.03) or stillbirth (0.25% v 0.44%; 0.65, 0.51 to 0.84). Findings were similar by trimester of vaccination, mRNA vaccine product, and number of doses received during pregnancy. CONCLUSION The findings suggest that vaccination against covid-19 during pregnancy is not associated with a higher risk of preterm birth, small for gestational age at birth, or stillbirth.

引用

页数：11

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