Dynamic ultrasound monitoring of intraperitoneal effusion for predicting complications after laparoscopic gastrectomy

Table 11 Analysis results of Cox regression

Risk factors	β	HR (95%CI)	Wald χ2	P value
Nature of effusion (mixed)	1.352	3.86 (1.62-9.18)	9.714	0.002
Age (years)	0.018	1.02 (0.98-1.06)	1.134	0.287
Surgical approach (total gastrectomy)	0.473	1.60 (0.72-3.56)	1.498	0.221
Day 3 CRP (per 10 mg/L)	0.223	1.25 (1.05-1.49)	6.506	0.011
Day 3 PCT (per 0.1 ng/mL)	0.293	1.34 (1.09-1.65)	7.837	0.005

P < 0.05 indicated significant difference. Mixed effusion, postoperative day 3 C-reactive protein, and postoperative day 3 procalcitonin were independent predictors of complications. β: Coefficient estimate; HR: Hazard ratio; CI: Confidence interval; CRP: C-reactive protein; PCT: Procalcitonin.