Table 2 Results for sPTB < 37.

From: Mid-trimester prediction of spontaneous preterm birth with automated cervical quantitative ultrasound texture analysis and cervical length: a prospective study

Method

AUC

Accuracy

Detection rate

FP rate

PPV

NPV

LR + 

LR − 

qPREM

63.4 (± 8.0)

611/633 (96.5% ± 0.2%)

5/23 (21.7% ± 2.7%)

4/633 (0.6% ± 0.1%)

5/9 (55.6% ± 4.6%)

606/624 (97.1% ± 0.1%)

33.2 (± 7.3)

0.8 (± 0.0)

CL <  = 25 mm

55.5 (± 12.6)

609/633 (96.2% ± 0.1%)

2/23 (8.7% ± 2.0%)

3/633 (0.5% ± 0.1%)

2/5 (40.0% ± 4.6%)

607/628 (96.7% ± 0.1%)

17.7 (± 3.6)

0.9 (± 0.0)

qPREM + CL <  = 25 mm

67.5 (± 10.9)

610/633 (96.4% ± 0.2%)

7/23 (30.4% ± 3.1%)

7/633 (1.1% ± 0.2%)

7/14 (50.0% ± 4.4%)

603/619 (97.4% ± 0.1%)

26.5 (± 5.1)

0.7 (± 0.0)

  1. N = 633, 23 cases, 610 controls (prevalence 3.6%).
  2. qPREM QUANTUSPREMATURITY, CL cervical length, FP Rate false positive rate, PPV positive predictive value, NPV negative predictive value, LR + positive likelihood ratio, LR − negative likelihood ratio.