Table 3.

Diagnostic accuracy of the four test strategies

Test strategySensitivity (95% CI)LR+ (95% CI)PPV (95% CI)
Specificity (95% CI)LR− (95% CI)NPV (95% CI)
Unaided clinical judgement82.9 (72.4 to 89.9)2.13 (1.83 to 2.48)22.7 (18.0 to 28.2)
61.0 (56.7 to 65.2)0.28 (0.17 to 0.47)96.3 (93.6 to 97.9)
Marburg Heart Score91.4 (82.5 to 96.0)2.32 (2.04 to 2.64)24.2 (19.5 to 29.8)
60.6 (56.3 to 64.8)0.14 (0.07 to 0.30)98.1 (95.9 to 99.1)
Triage81.4 (70.8 to 88.8)2.98 (2.48 to 3.56)29.1 (23.2 to 35.8)
72.6 (68.6 to 76.3)0.26 (0.16 to 0.42)96.6 (94.3 to 98.0)
Aided clinical judgement90.9 (72.2 to 97.5)2.74 (2.19 to 3.43)20.6 (13.8 to 29.7)
66.8 (60.5 to 72.6)0.14 (0.04 to 0.51)98.7 (95.5 to 99.6)
  • LR+ = positive likelihood ratio. LR− = negative likelihood ratio. PPV = positive predictive value. NPV = negative predictive value.