@techreport{Balinskaite:2016:10.3310/hsdr04290,
author = {Balinskaite, V and Aylin, P and Bennett, P and Bottle, R and Brett, S and Sodhi, V and Rivers, A},
booktitle = {Estimating the risk of adverse birth outcomes in pregnant women undergoing non-obstetric surgery using routinely collected NHS data: an observational study},
doi = {10.3310/hsdr04290},
publisher = {NIHR Journals Library},
title = {Estimating the risk of adverse birth outcomes in pregnant women undergoing non-obstetric surgery using routinely collected NHS data: an observational study},
url = {http://dx.doi.org/10.3310/hsdr04290},
year = {2016}
}

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TY  - RPRT
AB  - Background:Previous research suggests that non-obstetric surgery is carried out in 1–2% of allpregnancies. However, there is limited evidence quantifying the associated risks. Furthermore, of theevidence available, none relates directly to outcomes in the UK, and there are no current NHS guidelinesregarding non-obstetric surgery in pregnant women.Objectives:To estimate the risk of adverse birth outcomes of pregnancies in which non-obstetric surgerywas or was not carried out. To further analyse common procedure groups.Data Source:Hospital Episode Statistics (HES) maternity data collected between 2002–3 and 2011–12.Main outcomes:Spontaneous abortion, preterm delivery, maternal death, caesarean delivery, longinpatient stay, stillbirth and low birthweight.Methods:We utilised HES, an administrative database that includes records of all patient admissions andday cases in all English NHS hospitals. We analysed HES maternity data collected between 2002–3 and2011–12, and identified pregnancies in which non-obstetric surgery was carried out. We used logisticregression models to determine the adjusted relative risk and attributable risk of non-obstetric surgicalprocedures for adverse birth outcomes and the number needed to harm.Results:We identified 6,486,280 pregnancies, in 47,628 of which non-obstetric surgery was carried out.In comparison with pregnancies in which surgery was not carried out, we found that non-obstetric surgerywas associated with a higher risk of adverse birth outcomes, although the attributable risk was generallylow. We estimated that for every 287 pregnancies in which a surgical operation was carried out there wasone additional stillbirth; for every 31 operations there was one additional preterm delivery; for every25 operations there was one additional caesarean section; for every 50 operations there was oneadditional long inpatient stay; and for every 39 operations there was one additional low-birthweight baby.Limitations:We
AU  - Balinskaite,V
AU  - Aylin,P
AU  - Bennett,P
AU  - Bottle,R
AU  - Brett,S
AU  - Sodhi,V
AU  - Rivers,A
DO  - 10.3310/hsdr04290
PB  - NIHR Journals Library
PY  - 2016///
TI  - Estimating the risk of adverse birth outcomes in pregnant women undergoing non-obstetric surgery using routinely collected NHS data: an observational study
T1  - Estimating the risk of adverse birth outcomes in pregnant women undergoing non-obstetric surgery using routinely collected NHS data: an observational study
UR  - http://dx.doi.org/10.3310/hsdr04290
UR  - http://hdl.handle.net/10044/1/43217
ER  - 

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