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Table 3 Diagnostic characteristics of index tests for pneumothorax

From: “Anterior convergent” chest probing in rapid ultrasound transducer positioning versus formal chest ultrasonography to detect pneumothorax during the primary survey of hospital trauma patients: a diagnostic accuracy study

  Chest ultrasound Chest radiography Comparison
Parameter Value 95 % CI Value 95 % CI P-Value
Sensitivity 78 52–93 36.4 11–69 <0.001
Specificity 92 83–97 98 90–100 0.1
LR+ 10 4.3–25 18 2–144 0.007
LR- 0.25 0.1–0.6 0.65 0.4–1 <0.001
PPV 74 49–91 80 28–99 0.4
NPV 94 85–98 87 75–95 0.14
  1. LR+: positive likelihood ratio; LR-: negative likelihood ratio; CI: confidence interval. All values are expressed as percentages, except for LR+ and LR-