Skip to main content

Table 2 Test characteristics in predicting massive transfusion (≥10 units of packed red blood cells) based on previously suggested threshold values [12 ]

From: Detection of acute traumatic coagulopathy and massive transfusion requirements by means of rotational thromboelastometry: an international prospective validation study

  Detection rate False positive rate PPV NPV
INR >1.2 51.1 (36.1-65.9) 8.8 (6.8-11.0) 27.3 (18.3-37.9) 96.7 (95.0-97.9)
CT >94 sec 28.9 (16.4-44.3) 8.8 (6.9-11.2) 16.5 (9.1-26.5) 95.5 (93.7-96.9)
CA5 ≤ 35 mm 45.5 (30.4-61.2) 16.1 (13.5-19.0) 14.4 (9.0-21.3) 96.3 (94.5-97.6)
Alpha angle <65° 37.2 (23.0-53.3) 12.2 (9.9-14.8) 15.1 (8.9-23.4) 96.0 (94.2-97.3)
  1. PPV, positive predictive value; NPV, negative predictive value; INR, international normalized ratio; CT, clotting time; CA5, clotting amplitude after 5 minutes.