Table 3 Discrimination and the NB based on the lowest risk score of quintile 5 as the cut-off value in each risk score.

From: Risk scores for predicting small for gestational age infants in Japan: The TMM birthree cohort study

Cut-off (Minimum risk score of quintile 5)

TPR (Sensitivity) (95% CI)

Specificity (95% CI)

PPV (95% CI)

NPV (95% CI)

Positive LR (95% CI)

Negative LR (95% CI)

NB

Early gestation

Risk score = 5

(Predicted probability of SGA infants = 0.094)

0.401

(0.373–0.430)

0.797

(0.791–0.803)

0.122

(0.112–0.133)

0.950

(0.946–0.953)

1.98

(1.83–2.14)

0.75

(0.72–0.79)

0.007

Mid-gestation

Model 1: Risk score = 4

(Predicted probability of SGA infants = 0.095)

0.447

(0.418–0.476)

0.790

(0.784–0.797)

0.131

(0.120–0.141)

0.953

(0.949–0.957)

2.13

(1.98–2.29)

0.70

(0.66–0.74)

0.008

Model 2: Risk score = 4

(Predicted probability of SGA infants = 0.110)

0.432

(0.403–0.461)

0.841

(0.835–0.846)

0.161

(0.147–0.174)

0.954

(0.951–0.958)

2.71

(2.51–2.92)

0.68

(0.64–0.71)

0.011

  1. Abbreviations: CI, confidence interval; LR, likelihood ratio; NB, net benefit; NPV, negative predictive value; PPV, positive predictive value; SGA, small for gestational age; TPR, true positive rate.
Back to article page