s assess IQ. Foetal weight-deviation was calculated based on repeated ultrasound measurements of biparietal and mid-abdominal diameter at week 25, 33 and 37 of gestation for 29 SGA subjects and 75 controls. Weight-deviations were recorded as positive and negative percentages; zero denoted no deviation from individual expected growth. Mean and standard deviation (sd) for estimated foetal growth in the control group was used to dichotomize the SGA group into normal growth and IUGR (growth deviation of more than-2sd from control mean). Results The total SGA group had significantly lower IQ scores than the control group (p=0.001). In the subgroup with ultrasound measurements, six SGA subjects (21%) were defined as IUGR. In this subgroup, only these six had significantly lower IQ than controls (IQ 87 vs 101, p=0.003) whereas those with normal growth pattern did not differ from controls. Conclusions Young adults born SGA had reduced cognitive outcome. This decrease may be confined to SGA young adults with IUGR.
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