Figure 2.

Stratified analyses of the risk of the neonatal composite adverse outcome associated with diagnosis of small-for-gestational-age infants

Diagnosis of infants by universal ultrasonography in relation to indicators of fetal growth restriction. The five previously described indices of fetal growth restriction were classified as the extreme decile associated with fetal growth restriction (highest or lowest, as appropriate) compared with the other nine deciles in the cohort. Points are relative risks of neonatal morbidity associated with an ultrasonic diagnosis of a small-for-gestational-age infant at the last scan before birth. p values are a Mantel-Haenszel test calculation of interaction (ie, testing the hypothesis that the association between diagnosis of a small-for-gestation-age infant and neonatal morbidity varies in the two strata). Interactions tested using logistic regression showed almost identical p values. AC=abdominal circumference. FL=femur length. HC=head circumference.