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Table 4 Sensitivity, specificity and predictive values for new caries lesions (ΔDFS > 0) over 3 years

From: Caries risk assessment in young adults: a 3 year validation of the Cariogram model

Cariogram cut-off, %

TP + TNa

Sensitivity

Specificity

PPVb

NPVb

Youden’s indexc

80

53.1

89.2

33.5

42.0

85.3

0.23

60

65.8

61.3

71.0

53.3

77.3

0.32

40

67.8

25.6

90.6

59.5

69.3

0.16

20

65.8

11.9

94.8

55.4

66.6

0.07

  1. aProportion of true positive (TP) and true negative (TN) tests.
  2. bPPV = positive predictive value; NPV = negative predictive value.
  3. cJ = sensitivity + specificity −1.