Diabetes Care, Vol 18, Issue 12 1527-1533, Copyright © 1995 by American Diabetes Association
Pregnancy outcomes in women without gestational diabetes mellitus related to the maternal glucose level. Is there a continuum of risk?
RG Moses and D Calvert
Illawarra Area Health Service and the University of Wollongong, New South Wales, Australia.
OBJECTIVE: To examine selected pregnancy outcomes in women without
gestational diabetes mellitus to see whether there was a continuum of risk
related to the maternal glucose level. RESEARCH DESIGN AND METHODS:
Consecutive women attending two prenatal clinics and three obstetricians in
private practice were tested for GDM at the beginning of the third
trimester using a 75-g glucose load in the fasting state. The rate of
induction, the number of assisted deliveries, the presence of
pregnancy-induced hypertension, fetal birth weights, and morbidity were
examined with respect to the maternal 2-h glucose level. RESULTS: Data were
available for 1,441 women with a 2-h glucose level < 8.0 mmol/l (144
mg/dl). For each 1.0 mmol/l (18 mg/dl) increase in the glucose level, the
odds in favor of an assisted delivery increased by 15.2%, and the odds in
favor of the baby being admitted to a special care nursery (SCN) increased
by 22.6%. There was no significant association between maternal glucose
levels and the probability of either pregnancy-induced hypertension or a
large-for-gestational-age (LGA) baby after adjustment for other variables.
CONCLUSIONS: In normal women there is a continuum of risk related to the
maternal glucose level 2 h after a glucose tolerance test for the
probability of having an assisted delivery and the likelihood of the baby
being admitted to an SCN. The chance of having pregnancy-induced
hypertension or a LGA baby also increased as the maternal glucose level
increased but could be largely explained by an increasing body mass index.