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
| Â | 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) | Â | Â | Â | Â | Â | Â | Â | Â | Â |
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 ** |
| Â | Â | Â | Â | * p = 0.36 | ** p = 0.24 | ||||