Table 4. Independent risk factors for postoperative mortality.

Variable	Risk factors for mortality
	Odd ratio (95% CI)	P-value
Initial shock	0.096 (0.007–1.311)	0.079
Postoperative lactate level (mmol/L)	1.926 (1.201–3.089)	0.007
SOFA score on ICU admission	1.593 (1.160–2.187)	0.004
POD1 DNI (%)	1.118 (1.028–1.215)	0.009

Injury severity score>15, solid organ injury, combined injury, initial shock, postoperative lactate level, SOFA score on ICU admission, and DNI on POD1 were used as variables for multivariate analysis. CI, confidence interval; DNI, delta neutrophil index; SOFA, sequential organ failure assessment; POD1, postoperative day 1; ICU, intensive care unit.