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Table 2 Comparison of Period 1 and 2 for patients undergoing laparotomy

From: Abdominal injuries in a major Scandinavian trauma center – performance assessment over an 8 year period

  Period 1 Period 2 p
  n = 163 n = 296  
Age, mean 37.4 36.6 0.63
Male (%) 127 (78) 220 (74) 0.42
Blunt (%) 99 (61) 183 (62) 0.84
GCS score, median (quartiles) 15.0 (5.0-15.0) 15.0 (9.0-15.0) 0.09
ISS, median (quartiles) 29.0 (10.0-45.0) 25.0 (10.0-38.0) 0.02
LOS, median (quartiles) 5.0 (2.0-11.0) 8.0 (3.0-16.0) <0.01
Deaths (%) 60 (37) 59 (20) <0.01
W NTDB 05 (95% CI) 0.25 (-3.81 to 4.30) 3.91 (0.99 to 6.84)  
  1. GCS: Glascow Coma Scale; ISS: injury severity score; LOS: length of stay; W NTDB 05: W-statistics with coefficients from National Trauma Data Bank 2005; CI: confidence interval.
  2. One patient from period 2 has missing data on age, mechanism of injury, GCS and ISS.