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. Author manuscript; available in PMC: 2017 Aug 30.
Published in final edited form as: Am J Surg. 2010 Apr 10;201(2):209–215. doi: 10.1016/j.amjsurg.2009.12.005

Table 2.

Univariate risk factor analysis for the timing of PE

Predictor Early PE (%) Late PE (%) P value
Age (y, mean) 42.7 40.2   .44
Sex (male) 29 (35) 53 (65)   .066
Mechanism (blunt) 37 (38) 60 (62)   .12
ISS (median) 12 26   .001*
Hypotension (SBP <90)   3 (38)   5 (62) 1.00
GCS (≤8)   5 (19) 21 (81)   .012*
ICU admission 16 (26) 46 (74) <.0001*
Number units PRBCs transfused <24 h after injury (mean) 1.1 2.1   .26
No major operative procedure first 48 h after injury 11 (26) 31 (74)   .017*
AIS head (≥3)   3 (8) 36 (92) <.0001*
AIS chest (≥3) 13 (28) 33 (72)   .03*
AIS abdomen (≥3)   5 (28) 13 (72)   .30
AIS extremity (≥3) 24 (51) 23 (49)   .075
Lower-extremity AIS (≥3) 21 (51) 20 (49)   .11
≥1 long bone extremity fracture 26 (54) 22 (46)   .018*
Pelvic fracture 13 (38) 21 (62)   .83
Spine fracture   5 (24) 16 (76)   .089
Spinal cord injury   1 (14)   6 (86)   .24

ISS Injury Severity Score; PRBCs packed red blood cells.

*

Indicates P < 0.05.