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 <10th centile (SGA n = 2, no SGA n = 23 missing).
***missing data numbers for abdominal circumference z score <10th 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.