Dose-response Relationship Between Alcohol Consumption Before and During Pregnancy and the Risks of Low Birthweight, Preterm Birth and Small for Gestational Age (SGA)-a Systematic Review and Meta-analyses

Overview

Journal BJOG

Specialty Gynecology & Obstetrics

Date 2011 Jul 7

PMID 21729235

Citations 200

Authors

J Patra

R Bakker

H Irving

V W V Jaddoe

S Malini

J Rehm

Affiliations

Soon will be listed here.

Abstract

Background: Descriptions of the effects of moderate alcohol consumption during pregnancy on adverse pregnancy outcomes have been inconsistent.

Objective: To review systematically and perform meta-analyses on the effect of maternal alcohol exposure on the risk of low birthweight, preterm birth and small for gestational age (SGA).

Search Strategy: Using Medical Subject Headings, a literature search of MEDLINE, EMBASE, CINAHL, CABS, WHOlist, SIGLE, ETOH, and Web of Science between 1 January 1980 and 1 August 2009 was performed followed by manual searches.

Selection Criteria: Case-control or cohort studies were assessed for quality (STROBE), 36 available studies were included.

Data Collection And Analysis: Two reviewers independently extracted the information on low birthweight, preterm birth and SGA using a standardised protocol. Meta-analyses on dose-response relationships were performed using linear as well as first-order and second-order fractional polynomial regressions to estimate best fitting curves to the data.

Main Results: Compared with abstainers, the overall dose-response relationships for low birthweight and SGA showed no effect up to 10 g pure alcohol/day (an average of about 1 drink/day) and preterm birth showed no effect up to 18 g pure alcohol/day (an average of 1.5 drinks/day); thereafter, the relationship showed a monotonically increasing risk for increasing maternal alcohol consumption. Moderate consumption during pre-pregnancy was associated with reduced risks for all outcomes.

Conclusions: Dose-response relationship indicates that heavy alcohol consumption during pregnancy increases the risks of all three outcomes whereas light to moderate alcohol consumption shows no effect. Preventive measures during antenatal consultations should be initiated.

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