Table 3 Observer area under the curve (AUC) and optimism adjusted AUC after 1000-fold bootstrapping for adverse outcomes before 34 weeks’ gestation.

From: Risk stratification for early-onset fetal growth restriction in women with abnormal serum biomarkers: a retrospective cohort study

Adverse pregnancy outcome < 34 weeks

Original sample

Bootstrapped sample

AUC

SE

95% CI

AUC

SE

95% CI

FGR (3rd centile)

0.934

0.033

0.867–1.000

0.950

0.013

0.924–0.976

SGA (< 10th centile)

0.904

0.035

0.835–0.973

0.922

0.018

0.886–0.958

Delivery < 34 weeks

0.816

0.039

0.740–0.892

0.834

0.026

0.784–0.884

Iatrogenic delivery/stillbirth < 34 weeks

0.869

0.040

0.790–0.948

0.841

0.030

0.783–0.899

  1. AUC area under curve, SE standard error, CI confidence interval, FGR fetal growth restriction, SGA small for gestational age.
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