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Table 3 Optimal cut offs based on probability with sensitivity and specificity

From: Risk factors for postpartum sepsis: a nested case-control study

Method

Optimal Cutoff of probability

Sensitivity%

Specificity%

*PPV

*NPV

High sensitivity and low specificity

0.069

82% (73.0–88.6)

64.8% (60.4–65.9)

31.9% (28.7–35.2)

94.7% (92.1–96.4)

Similar sensitivity and specificity

0.086

76.3% (66.3–83.9)

74.0% (71.4–79.6)

38.7% (34.3–43.3)

94.0% (91.7–95.7)

High specificity and low sensitivity

0.106

70.0% (62.1–80.5)

80.7% (77.1–84.2)

43% (37.8–48.6)

93.5% (91.2–95.1)

  1. *Positive predictive value *Negative predictive value