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Table 1 Cross-tabulation of the ultrasound 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

  Results for pneumothorax Total
Negative CT scans Positive CT scans
Results for pneumothorax Negative ultrasounds 61 4 65
Positive ultrasounds 5 14 19
Total 66 18 84