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Table 4 Performance characteristics of the Oakland Score at various thresholds with 95% confidence intervals

From: Oakland score to identify low-risk patients with lower gastrointestinal bleeding performs well among emergency department patients

Oakland Score Cutoff

n

Sensitivity

Specificity

PPV

NPV

Positive LR

Negative LR

7

728

98%

(98–99%)

11%

(11–12%)

29%

(28–30%)

95%

(93–96%)

1.11

(1.1–1.12)

0.15

(0.11–0.2)

8

1358

97%

(96–98%)

21%

(20–22%)

31%

(30–33%)

95

(94–96%)

1.23

(1.22–1.25)

0.14

(0.11–0.18)

9

2087

95%

(94–96%)

33%

(31–34%)

34%

(33–35%)

94%

(93–95%)

1.40

(1.38–1.43)

0.16

(0.14–0.19)

10

2743

93%

(92–94%)

43%

(41–44%)

38%

(36–39%)

94%

(93–95%)

1.62

(1.58–1.66)

0.17

(0.14–0.2)

15

5070

79%

(77–81%)

76%

(75–77%)

55%

(54–57%)

91%

(90–92%)

3.33

(3.17–3.5)

0.27

(0.25–0.3)

  1. Notes: Abbreviations: PPV, positive predictive value; NPV, negative predictive value; Positive LR, likelihood ratio