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Table 4 W-statistic based on TRISS comparing all trauma patients, transfused patients and massively transfused patients day 1-2.

From: Trends in transfusion of trauma victims - evaluation of changes in clinical practice

  All trauma patients Transfused trauma patients Massively transfused trauma patients
First six months of 2002 2004 2007 2002 2004 2007 2002 2004 2007
Number 315 341 459 62 74 94 13 19 9
Non-survival N (%) 24(7,6) 34(10,0) 34(7,4) 12(19,4) 22(29,7) 19(20,2) 4(30,8) 8(42,1) 3(33,3)
W-statistic 1,98 0,34 0,66 3,99 3,9 5,18 15,3 8,89 9,76
(NTDB 05)          
95% C.I (-0,15 -4,12) (-1,66 -2,34) (-1,03 -2,35) (-3,21 -11,19) (-3,08 -10,88) (-0,92 -11,28) (-2,40 -33,0) (-6,47 -24,26) (-13,87 -33,4)
ISS median 10 10 10 27 29,5 29 38 43 38
ISS mean 14,9 15,2 14,7 29,9 31,5 30,7 38,5 42 41,1
NISS median 11 13 12 34 38 41 43 50 57
NISS mean 19,3 20 19 39,6 40,5 41,5 42,8 */** 48,7 * 52,6 **
     * p = 0.36 ** p = 0.24
  1. ISS = Injury Severity Score. RTS = Revised Trauma Score.