. Author manuscript; available in PMC: 2022 Mar 1.

Published in final edited form as: Am J Obstet Gynecol. 2020 Sep 9;224(3):288.e1–288.e17. doi: 10.1016/j.ajog.2020.09.002

TABLE 3.

Comparison of AUCs and sensitivity at fixed specificity between customized and noncustomized cervical length screening

Gestational age at measurement (wk)	Number of pregnancies with a scan in this interval (% of sPTB cases)	AUC			Sensitivity at 10% FPR
		Noncustomized	Customized	Pvalue	Noncustomized		Customized		Pvalue
		Noncustomized	Customized	Pvalue	Cutoff (mm)	Sensitivity	Cutoff (percentile)	Sensitivity	Pvalue
20–23 6/7	4169 (12.0%)	71%	72%	.001	28	40%	15	50%	<.001
24–27 6/7	4338 (11.7%)	71%	72%	<.001	25	36%	14	50%	<.001
28–31 6/7	4209 (10.7%)	70%	72%	<.001	21	33%	16	53%	<.001
32–35 6/7	3956 (7.5%)	67%	71%	<.001	18	29%	21	54%	<.001

AUC, area under the ROC curve; FPR, false positive rate; ROC, receiver operating characteristic; sPTB, spontaneous preterm birth.