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Table 4 Anatomical characteristic of all-types non-invasive and invasive wounds

From: Performance of pre-hospital evaluations in ruling out invasive chest stab wounds

 All-types IW (n=113)Non IW (n=141)p
Number of wounds, med[IQR]1[1-2]3[1-4]<0.01a
Blowing wound/SE, n (%)16(14)1(0.7)<0.01b
Hemorrhagic wound, n (%)14(12)10(7)0.16b
Wound size (centimeters), med[IQR]2[1.5-3]1.5[1-2.6]<0.01a
Location of the wounds
 Thoracoabdominal zone, n (%)66(58)63(45)0.02b
 Cardiac box, n (%)67(59)95(67)0.34
 Supraclavicular zone, n (%)3(3)4(3)1c
 Lateral zone, n (%)42(37)47(33)0.44b
 Posterior wound, n (%)21(19)57(40)<0.01
  1. Definition : IW Invasive Wound, SE Subcutaneous Emphysema * The same woundassociated with thoracic and abdominal lesions Statistical tests: a = Mann-Withney U-test; b = Chi-square test; c = Fisher's exact test