Aim-To study the neurobehavioural effects that diabetes during pregnan
cy might have on children by school age. Methods-The neurobehavioural
function of 57 school age children born to 48, well controlled diabeti
c mothers was compared with 57 control children matched for age, birth
order, and parental socioeconomic status, using several cognitive, be
havioural, sensory and motor neurological tests. Results-The IQ scores
of the index group children were similar to those of control children
(117.7+/-13.4 vs 118.5+/-10.1). There were no differences between the
groups in various sensory motor functions. However, the index group c
hildren performed less well than the controls on indices of fine and g
ross motor functions, as observed on the Bruininks-Oseretzky test of m
otor proficiency. The scores of children born to diabetic mothers were
higher than controls on the Touwen and Prechtl neurological examinati
on. They also performed worse in the Pollack tapper test which is desi
gned to detect minor neurological deficits, inattention, and hyperacti
vity. The index children had higher scores on the Conners abbreviated
parent-teacher questionnaire which measures hyperactivity and inattent
ion. There was a negative correlation between the performance of the i
ndex group children on various neurodevelopmental and behavioural test
s and the severity of hyperglycaemia, as assessed by blood glycosylate
d haemoglobin and acetonuria. Conclusions-Diabetes during pregnancy ad
versely affects some fine neurological functions in children at school
age, but not their cognitive scores. These effects are not correlated
with the degree of glycaemic control.