Skip to main content

Table 5 Number of deaths due to bleeding avoided and number needed to treat with pre-hospital treatment within 3 h of injury according to BATT score threshold as treatment criteria

From: Validation of the BATT score for prehospital risk stratification of traumatic haemorrhagic death: usefulness for tranexamic acid treatment criteria

BATT Score Threshold for TXA treatment Total patients included in TARN N (%) Number of patients considered for treatmenta N (%) Number of deaths avoided by BATT score threshold Standardized number of deaths avoided per 10,000 Number needed to treatb Additional NNTc for change of one point of BATT score
≥ 14 586 (< 1) 534 (< 1) 37 4.7 14
≥ 13 737 (< 1) 671 (< 1) 42 5.3 16 27
≥ 12 960 (1) 883 (1) 47 5.9 19 42
≥ 11 1266 (1) 1150 (1) 53 6.7 22 45
≥ 10 1727 (2) 1557 (2) 59 7.4 27 23
≥ 9 2533 (2) 2272 (2) 68 8.6 34 79
≥ 8 3859 (4) 3420 (3) 80 10.1 43 128
≥ 7 6879 (7) 5898 (6) 97 12.2 61 146
≥ 6 10,071 (10) 8584 (8) 109 13.7 78 224
≥ 5 16,032 (15) 13,335 (13) 124 15.6 108 317
≥ 4 22,946 (22) 18,769 (18) 136 17.1 138 452
≥ 3 33,483 (32) 27,062 (26) 152 19.1 179 518
≥ 2 80,071 (76) 61,598 (59) 210 26.4 293 595
≥ 1 89,948 (86) 68,452 (65) 216 27.2 316 1142
≥ 0 104,862 (100) 79,430 (76) 224 28.2 354 1372
  1. TXA Tranexamic acid, NNT Number needed to treat
  2. aNumber of trauma patients within 3 h of injury and the arrival of the first ambulance. Proportions are based on all patients included in the TARN registry with ISS ≥ 9
  3. bStandardized number of deaths avoided per 10,000 trauma patients within 3 h included in the TARN registry with an ISS ≥9
  4. cAdditional trauma patients needed to treat for each death avoided compared to the BATT score threshold above