Univariable and multivariable comparisons of clinical and ultrasound risk factors for All SGA by customised birthweight centiles.

Data are mean (SD) number (%) as appropriate, italics indicate variable is protective.*missing data numbers for woman’s birthweight (SGA n = 27, no SGA 169 missing.**missing data numbers for head circumference z score th centile (SGA n = 2, no SGA n = 23 missing).***missing data numbers for abdominal circumference z score th centile (SGA n = 1, no SGA n = 12 missing).†Unimputed data was used for univariable analyses.††Unimputed ultrasound data was added to the multivariable models derived from 15 week imputed data.