. Author manuscript; available in PMC: 2019 Oct 1.

Published in final edited form as: Ultrasound Obstet Gynecol. 2018 Sep 3;52(4):473–478. doi: 10.1002/uog.18919

Table 1.

Linear models for change in middle cerebral artery pulsatility index Z-score (Δ_Z) from room air (Z_RA) to after maternal hyperoxygenation in 43 fetuses with hypoplastic left heart syndrome (HLHS) or HLHS variant

	Model Term						Model Selection Criteria
	Intercept		Z_RA		GA-28⁵
Model	Mean± SE⁶	P¹	Mean ± SE⁶	P¹	Mean ± SE⁶	P¹	BIC²	AUC³
Z_RA	−0.28 ± 0.11	0.018	−0.48 ± 0.09	<0.001	NA	NA⁴	117.8	0.756
GA	−0.09 ± 0.11	0.42	NA⁴	NA⁴	0.079 ± 0.018	0.001	128.2	0.725
Z_RA + GA	−0.29 ± 0.11	0.013	−0.39 ± 0.10	0.002	0.030 ± 0.019	0.13	119.3	0.777

P-values given for test of null hypothesis of model parameter having value of 0.

BIC, Bayesian information criterion;

AUC, area under the receiver – operating characteristics curve;

⁴

NA, not applicable;

⁵

GA, gestational age;

⁶

SE, standard error.