. Author manuscript; available in PMC: 2015 Sep 1.

Published in final edited form as: Am J Obstet Gynecol. 2014 Mar 5;211(3):253.e1–253.e8. doi: 10.1016/j.ajog.2014.02.033

Table 2.

First trimester ultrasound variables as predictors of SGA10

	Not SGA10 (N=522)	SGA10 (N=56)	P-value^a	Unadjusted AUC (95%CI)	Adjusted AUC^b (95%CI)	P-value^c
PV, cc	69.8(22)	55.5(17)	<0.001	0.695 (0.625–0.766)	0.743 (0.678–0.808)	0.004
PQ	0.79 (0.2)	0.63 (0.2)	<0.001	0.697 (0.627–0.767)	0.742 (0.677–0.807)	0.004
MPD, cm	11.4 (1.4)	10.6 (1.6)	<0.001	0.632 (0.556–0.707)	0.705 (0.634–0.777)	0.04
PMI	15.2 (3.0)	17.6 (3.4)	<0.001	0.711 (0.644–0.779)	0.740 (0.673–0.807)	0.005
MCD, cm	8.3 (1.0)	7.6 (0.8)	<0.001	0.688 (0.621–0.754)	0.736 (0.671–0.801)	0.003
Mean PI	1.45 (0.5)	1.64 (0.6)	0.01	0.614 (0.532–0.696)	0.6883 (0.619–0.758)	0.064

SGA10- birthweight <10th%ile; AUC- area under the curve; PV- placental volume; PQ- placental quotient; MPD- mean placental diameter; PMI- placental morphology index (MPD/PQ); MCD- mean chorionic diameter; PI- pulsatility index (uterine artery Doppler)

T-test;

Adjusted for race, chronic hypertension, and tobacco

P-value comparing the AUC for clinical model (0.652) to the adjusted model using clinical factors plus the ultrasound variable