International Journal of Epidemiology, Vol 21, S45-S71, Copyright © 1992 by International Epidemiological Association
SA Ogston and GJ Parry
Analyses were made of the relation between maternal alcohol consumption
before and in early pregnancy and five infant outcome variables:
birthweight, crown-heel length, occipitofrontal circumference and the Apgar
scores at 1 and 5 minutes. The data were analysed for all centres combined
and separately. From tabulation of the mean values of the outcome variables
by alcohol consumption, it appeared that a poorer outcome was related to
consumption of 120 g/week absolute alcohol or more. Multiple regression
analysis was used to allow for possible confounding by the child's
gestational age at birth and sex, the mother's age, parity and smoking
habit, and survey centre. Two threshold models were applied to the combined
data, taking the confounders into account. The offset threshold model
(assuming no effect of alcohol up to a threshold value, and then a constant
multiplicative effect at higher levels) suggested a negative effect on
birthweight at about 60 g/week absolute alcohol, but with a wide 85%
confidence interval of 5-130 g/week. A step function threshold model, which
assumes a constant effect above the threshold value, behaved erratically.
Similar analyses for crown-heel length and occipitofrontal circumference
provided only a very poor fit to the data. Data on reported congenital
anomalies are presented by survey centre and maternal alcohol consumption,
but due to the unstandardized method of collection they were not analysed
further.
ARTICLES
EUROMAC. A European concerted action: maternal alcohol consumption and its relation to the outcome of pregnancy and child development at 18 months. Results--strategy of analysis and analysis of pregnancy outcome
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