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. Author manuscript; available in PMC: 2015 Sep 1.
Published in final edited form as: Placenta. 2014 Jul 11;35(9):684–690. doi: 10.1016/j.placenta.2014.06.373

Table 5.

Second trimester placental measurements as predictors of LGA

Placental Measures, median (IQR) AGA (N=343) LGA (N=29) P-value Unadjusted AUC Adjusted P-value Adjusted AUC
Placental volume (cc) 237.5 (199.3–274.2) 265.4 (239.4–294.0) 0.001* 0.682 <0.001§ 0.767§
Placental Quotient (cc/days GA) 1.65 (1.40–1.90) 1.89 (1.7–2.0) 0.004* 0.697 <0.001§ 0.774§
Mean placental diameter (cm) 15.5 (15.3–15.7) 16.5 (15.8–17.2) 0.008^ 0.656 0.003 0.715
Mean chorionic diameter (cm) 13.5 (13.3–13.6) 14.1 (13.7–14.6) 0.01^ 0.648 0.005 0.712
*

Wilcoxon rank sum;

^

T-test;

§

Model adjusted for maternal age, nulliparity and pregestational diabetes

Model adjusted for maternal age and pregestational diabetes

-A model of clinical risk factors alone would include age, pregestational diabetes and maternal BMI and yield an AUC of 0.707.