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Table 2 Cross-tabulation of chest radiography results by CT scan 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

  Result for pneumothorax Total
Negative CT scans Negative CT scans  
Results for pneumothorax Negative chest radiographies 48 7 55
Positive chest radiographies 1 4 5
Total 49 11 60