The association between obstetrical interventions and late preterm birth

Objective There is concern that obstetric interventions (prelabor cesarean section and induced delivery) are drivers of late preterm (LP) birth. Our objective was to evaluate the independent association between obstetric interventions and LP birth and explore associated independent maternal and feta...

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Veröffentlicht in:American journal of obstetrics and gynecology 2014-06, Vol.210 (6), p.538.e1-538.e9
Hauptverfasser: Bassil, Kate L., PhD, Yasseen, Abdool S., MSc, Walker, Mark, MD, Sgro, Michael D., MD, Shah, Prakesh S., MD, Smith, Graeme N., MD, PhD, Campbell, Douglas M., MD, Mamdani, Muhammad, PharmD, Sprague, Ann E., PhD, Lee, Shoo K., MD, Maguire, Jonathon L., MD
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container_end_page 538.e9
container_issue 6
container_start_page 538.e1
container_title American journal of obstetrics and gynecology
container_volume 210
creator Bassil, Kate L., PhD
Yasseen, Abdool S., MSc
Walker, Mark, MD
Sgro, Michael D., MD
Shah, Prakesh S., MD
Smith, Graeme N., MD, PhD
Campbell, Douglas M., MD
Mamdani, Muhammad, PharmD
Sprague, Ann E., PhD
Lee, Shoo K., MD
Maguire, Jonathon L., MD
description Objective There is concern that obstetric interventions (prelabor cesarean section and induced delivery) are drivers of late preterm (LP) birth. Our objective was to evaluate the independent association between obstetric interventions and LP birth and explore associated independent maternal and fetal risk factors for LP birth. Study Design In this population-based cross-sectional study, the BORN Information System was used to identify all infants born between 34 and 40 completed weeks of gestation between 2005 and 2012 in Ontario, Canada. The association between obstetric interventions (preterm cesarean section and induced delivery) and LP birth (34 to 36 completed weeks' gestation vs 37 to 40 completed weeks' gestation) was assessed using generalized estimating equation regression. Results Of 917,013 births between 34 and 40 weeks, 49,157 were LP (5.4%). In the adjusted analysis, “any obstetric intervention” (risk ratio [RR], 0.65; 95% confidence interval [CI], 0.57–0.74), induction (RR, 0.71; 95% CI, 0.61–0.82) and prelabor cesarean section (RR, 0.66; 95% CI, 0.59–0.74) were all associated with a lower likelihood of LP vs term birth. Several independent potentially modifiable risk factors for LP birth were identified including previous cesarean section (RR, 1.28; 95% CI, 1.16–1.40), smoking during pregnancy (RR, 1.28; 95% CI, 1.21–1.36) and high material (RR, 1.1; 95% CI, 1.03–1.18) and social (RR, 1.09; 95% CI, 1.02–1.16) deprivation indices. Conclusion After accounting for differences in maternal and fetal risk, LP births had a 35% lower likelihood of obstetric interventions than term births. Obstetric care providers may be preferentially avoiding induction and prelabor cesarean section between 34 and 37 weeks' gestation.
doi_str_mv 10.1016/j.ajog.2014.02.023
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Our objective was to evaluate the independent association between obstetric interventions and LP birth and explore associated independent maternal and fetal risk factors for LP birth. Study Design In this population-based cross-sectional study, the BORN Information System was used to identify all infants born between 34 and 40 completed weeks of gestation between 2005 and 2012 in Ontario, Canada. The association between obstetric interventions (preterm cesarean section and induced delivery) and LP birth (34 to 36 completed weeks' gestation vs 37 to 40 completed weeks' gestation) was assessed using generalized estimating equation regression. Results Of 917,013 births between 34 and 40 weeks, 49,157 were LP (5.4%). In the adjusted analysis, “any obstetric intervention” (risk ratio [RR], 0.65; 95% confidence interval [CI], 0.57–0.74), induction (RR, 0.71; 95% CI, 0.61–0.82) and prelabor cesarean section (RR, 0.66; 95% CI, 0.59–0.74) were all associated with a lower likelihood of LP vs term birth. Several independent potentially modifiable risk factors for LP birth were identified including previous cesarean section (RR, 1.28; 95% CI, 1.16–1.40), smoking during pregnancy (RR, 1.28; 95% CI, 1.21–1.36) and high material (RR, 1.1; 95% CI, 1.03–1.18) and social (RR, 1.09; 95% CI, 1.02–1.16) deprivation indices. Conclusion After accounting for differences in maternal and fetal risk, LP births had a 35% lower likelihood of obstetric interventions than term births. Obstetric care providers may be preferentially avoiding induction and prelabor cesarean section between 34 and 37 weeks' gestation.</description><identifier>ISSN: 0002-9378</identifier><identifier>EISSN: 1097-6868</identifier><identifier>DOI: 10.1016/j.ajog.2014.02.023</identifier><identifier>PMID: 24582931</identifier><language>eng</language><publisher>United States: Mosby, Inc</publisher><subject>Adult ; cesarean delivery ; Cesarean Section - adverse effects ; Cesarean Section - statistics &amp; numerical data ; Cesarean Section - utilization ; Cross-Sectional Studies ; Delivery, Obstetric - statistics &amp; numerical data ; Female ; Gestational Age ; Humans ; Infant, Newborn ; Labor, Induced - statistics &amp; numerical data ; Labor, Induced - utilization ; late preterm ; Male ; maternal health ; obstetric intervention ; Obstetrics and Gynecology ; Ontario - epidemiology ; Population Surveillance ; Pregnancy ; Premature Birth - epidemiology ; Regression Analysis ; Risk Factors</subject><ispartof>American journal of obstetrics and gynecology, 2014-06, Vol.210 (6), p.538.e1-538.e9</ispartof><rights>Mosby, Inc.</rights><rights>2014 Mosby, Inc.</rights><rights>Copyright © 2014 Mosby, Inc. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c481t-a290781ce08d99e8d009736fd217980eecf5199c68089f7419282dbf3bc246373</citedby><cites>FETCH-LOGICAL-c481t-a290781ce08d99e8d009736fd217980eecf5199c68089f7419282dbf3bc246373</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.ajog.2014.02.023$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/24582931$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Bassil, Kate L., PhD</creatorcontrib><creatorcontrib>Yasseen, Abdool S., MSc</creatorcontrib><creatorcontrib>Walker, Mark, MD</creatorcontrib><creatorcontrib>Sgro, Michael D., MD</creatorcontrib><creatorcontrib>Shah, Prakesh S., MD</creatorcontrib><creatorcontrib>Smith, Graeme N., MD, PhD</creatorcontrib><creatorcontrib>Campbell, Douglas M., MD</creatorcontrib><creatorcontrib>Mamdani, Muhammad, PharmD</creatorcontrib><creatorcontrib>Sprague, Ann E., PhD</creatorcontrib><creatorcontrib>Lee, Shoo K., MD</creatorcontrib><creatorcontrib>Maguire, Jonathon L., MD</creatorcontrib><title>The association between obstetrical interventions and late preterm birth</title><title>American journal of obstetrics and gynecology</title><addtitle>Am J Obstet Gynecol</addtitle><description>Objective There is concern that obstetric interventions (prelabor cesarean section and induced delivery) are drivers of late preterm (LP) birth. Our objective was to evaluate the independent association between obstetric interventions and LP birth and explore associated independent maternal and fetal risk factors for LP birth. Study Design In this population-based cross-sectional study, the BORN Information System was used to identify all infants born between 34 and 40 completed weeks of gestation between 2005 and 2012 in Ontario, Canada. The association between obstetric interventions (preterm cesarean section and induced delivery) and LP birth (34 to 36 completed weeks' gestation vs 37 to 40 completed weeks' gestation) was assessed using generalized estimating equation regression. Results Of 917,013 births between 34 and 40 weeks, 49,157 were LP (5.4%). In the adjusted analysis, “any obstetric intervention” (risk ratio [RR], 0.65; 95% confidence interval [CI], 0.57–0.74), induction (RR, 0.71; 95% CI, 0.61–0.82) and prelabor cesarean section (RR, 0.66; 95% CI, 0.59–0.74) were all associated with a lower likelihood of LP vs term birth. Several independent potentially modifiable risk factors for LP birth were identified including previous cesarean section (RR, 1.28; 95% CI, 1.16–1.40), smoking during pregnancy (RR, 1.28; 95% CI, 1.21–1.36) and high material (RR, 1.1; 95% CI, 1.03–1.18) and social (RR, 1.09; 95% CI, 1.02–1.16) deprivation indices. Conclusion After accounting for differences in maternal and fetal risk, LP births had a 35% lower likelihood of obstetric interventions than term births. Obstetric care providers may be preferentially avoiding induction and prelabor cesarean section between 34 and 37 weeks' gestation.</description><subject>Adult</subject><subject>cesarean delivery</subject><subject>Cesarean Section - adverse effects</subject><subject>Cesarean Section - statistics &amp; numerical data</subject><subject>Cesarean Section - utilization</subject><subject>Cross-Sectional Studies</subject><subject>Delivery, Obstetric - statistics &amp; numerical data</subject><subject>Female</subject><subject>Gestational Age</subject><subject>Humans</subject><subject>Infant, Newborn</subject><subject>Labor, Induced - statistics &amp; numerical data</subject><subject>Labor, Induced - utilization</subject><subject>late preterm</subject><subject>Male</subject><subject>maternal health</subject><subject>obstetric intervention</subject><subject>Obstetrics and Gynecology</subject><subject>Ontario - epidemiology</subject><subject>Population Surveillance</subject><subject>Pregnancy</subject><subject>Premature Birth - epidemiology</subject><subject>Regression Analysis</subject><subject>Risk Factors</subject><issn>0002-9378</issn><issn>1097-6868</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kU9rGzEQxUVJaJy0X6CHssdc1tFI-0eCEggmrQOGHpKehVY722i7llxJdsi3rxYnOeRQGBhGvPcY_YaQL0CXQKG5Gpd69L-XjEK1pCwX_0AWQGVbNqIRJ2RBKWWl5K04I-cxjvPIJPtIzlhVCyY5LMj64RELHaM3VifrXdFhekJ0he9iwhSs0VNhXcJwQDcLYqFdX0w6YbELmN-3RWdDevxETgc9Rfz80i_Ir--3D6t1ufn54251sylNJSCVmknaCjBIRS8lip7mfXkz9AxaKSiiGWqQ0jSCCjm0FUgmWN8NvDOsanjLL8jlMXcX_N89xqS2NhqcJu3Q76OCmoOsoW3rLGVHqQk-xoCD2gW71eFZAVUzQTWqmaCaCSrKcvFs-vqSv--22L9ZXpFlwbejAPMvDxaDisaiM9jbgCap3tv_51-_s5vJuhnzH3zGOPp9cJmfAhWzQd3PR5tPCBXNiTXn_wC4tJY2</recordid><startdate>20140601</startdate><enddate>20140601</enddate><creator>Bassil, Kate L., PhD</creator><creator>Yasseen, Abdool S., MSc</creator><creator>Walker, Mark, MD</creator><creator>Sgro, Michael D., MD</creator><creator>Shah, Prakesh S., MD</creator><creator>Smith, Graeme N., MD, PhD</creator><creator>Campbell, Douglas M., MD</creator><creator>Mamdani, Muhammad, PharmD</creator><creator>Sprague, Ann E., PhD</creator><creator>Lee, Shoo K., MD</creator><creator>Maguire, Jonathon L., MD</creator><general>Mosby, Inc</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20140601</creationdate><title>The association between obstetrical interventions and late preterm birth</title><author>Bassil, Kate L., PhD ; Yasseen, Abdool S., MSc ; Walker, Mark, MD ; Sgro, Michael D., MD ; Shah, Prakesh S., MD ; Smith, Graeme N., MD, PhD ; Campbell, Douglas M., MD ; Mamdani, Muhammad, PharmD ; Sprague, Ann E., PhD ; Lee, Shoo K., MD ; Maguire, Jonathon L., MD</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c481t-a290781ce08d99e8d009736fd217980eecf5199c68089f7419282dbf3bc246373</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Adult</topic><topic>cesarean delivery</topic><topic>Cesarean Section - adverse effects</topic><topic>Cesarean Section - statistics &amp; numerical data</topic><topic>Cesarean Section - utilization</topic><topic>Cross-Sectional Studies</topic><topic>Delivery, Obstetric - statistics &amp; numerical data</topic><topic>Female</topic><topic>Gestational Age</topic><topic>Humans</topic><topic>Infant, Newborn</topic><topic>Labor, Induced - statistics &amp; numerical data</topic><topic>Labor, Induced - utilization</topic><topic>late preterm</topic><topic>Male</topic><topic>maternal health</topic><topic>obstetric intervention</topic><topic>Obstetrics and Gynecology</topic><topic>Ontario - epidemiology</topic><topic>Population Surveillance</topic><topic>Pregnancy</topic><topic>Premature Birth - epidemiology</topic><topic>Regression Analysis</topic><topic>Risk Factors</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bassil, Kate L., PhD</creatorcontrib><creatorcontrib>Yasseen, Abdool S., MSc</creatorcontrib><creatorcontrib>Walker, Mark, MD</creatorcontrib><creatorcontrib>Sgro, Michael D., MD</creatorcontrib><creatorcontrib>Shah, Prakesh S., MD</creatorcontrib><creatorcontrib>Smith, Graeme N., MD, PhD</creatorcontrib><creatorcontrib>Campbell, Douglas M., MD</creatorcontrib><creatorcontrib>Mamdani, Muhammad, PharmD</creatorcontrib><creatorcontrib>Sprague, Ann E., PhD</creatorcontrib><creatorcontrib>Lee, Shoo K., MD</creatorcontrib><creatorcontrib>Maguire, Jonathon L., MD</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>American journal of obstetrics and gynecology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bassil, Kate L., PhD</au><au>Yasseen, Abdool S., MSc</au><au>Walker, Mark, MD</au><au>Sgro, Michael D., MD</au><au>Shah, Prakesh S., MD</au><au>Smith, Graeme N., MD, PhD</au><au>Campbell, Douglas M., MD</au><au>Mamdani, Muhammad, PharmD</au><au>Sprague, Ann E., PhD</au><au>Lee, Shoo K., MD</au><au>Maguire, Jonathon L., MD</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The association between obstetrical interventions and late preterm birth</atitle><jtitle>American journal of obstetrics and gynecology</jtitle><addtitle>Am J Obstet Gynecol</addtitle><date>2014-06-01</date><risdate>2014</risdate><volume>210</volume><issue>6</issue><spage>538.e1</spage><epage>538.e9</epage><pages>538.e1-538.e9</pages><issn>0002-9378</issn><eissn>1097-6868</eissn><abstract>Objective There is concern that obstetric interventions (prelabor cesarean section and induced delivery) are drivers of late preterm (LP) birth. Our objective was to evaluate the independent association between obstetric interventions and LP birth and explore associated independent maternal and fetal risk factors for LP birth. Study Design In this population-based cross-sectional study, the BORN Information System was used to identify all infants born between 34 and 40 completed weeks of gestation between 2005 and 2012 in Ontario, Canada. The association between obstetric interventions (preterm cesarean section and induced delivery) and LP birth (34 to 36 completed weeks' gestation vs 37 to 40 completed weeks' gestation) was assessed using generalized estimating equation regression. Results Of 917,013 births between 34 and 40 weeks, 49,157 were LP (5.4%). In the adjusted analysis, “any obstetric intervention” (risk ratio [RR], 0.65; 95% confidence interval [CI], 0.57–0.74), induction (RR, 0.71; 95% CI, 0.61–0.82) and prelabor cesarean section (RR, 0.66; 95% CI, 0.59–0.74) were all associated with a lower likelihood of LP vs term birth. Several independent potentially modifiable risk factors for LP birth were identified including previous cesarean section (RR, 1.28; 95% CI, 1.16–1.40), smoking during pregnancy (RR, 1.28; 95% CI, 1.21–1.36) and high material (RR, 1.1; 95% CI, 1.03–1.18) and social (RR, 1.09; 95% CI, 1.02–1.16) deprivation indices. Conclusion After accounting for differences in maternal and fetal risk, LP births had a 35% lower likelihood of obstetric interventions than term births. Obstetric care providers may be preferentially avoiding induction and prelabor cesarean section between 34 and 37 weeks' gestation.</abstract><cop>United States</cop><pub>Mosby, Inc</pub><pmid>24582931</pmid><doi>10.1016/j.ajog.2014.02.023</doi></addata></record>
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subjects Adult
cesarean delivery
Cesarean Section - adverse effects
Cesarean Section - statistics & numerical data
Cesarean Section - utilization
Cross-Sectional Studies
Delivery, Obstetric - statistics & numerical data
Female
Gestational Age
Humans
Infant, Newborn
Labor, Induced - statistics & numerical data
Labor, Induced - utilization
late preterm
Male
maternal health
obstetric intervention
Obstetrics and Gynecology
Ontario - epidemiology
Population Surveillance
Pregnancy
Premature Birth - epidemiology
Regression Analysis
Risk Factors
title The association between obstetrical interventions and late preterm birth
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