Role of clinical data and multidetector computed tomography findings in acute superior mesenteric artery embolism

Table 6 Univariate cox regression

	HR	95%CI	P value
Intestinal wall thinking	2.27	(0.61-8.45)	0.223
Intestinal wall thinning	13.35	(1.54-99.01)	0.018
Pneumatosis intestinalis	5.73	(1.41-23.35)	0.015
Other organ infarction	1.79	(0.48-6.67)	0.386
mesenteric fat stranding	2.96	(0.62-14.27)	0.176
Blood lactate > 2.1 mmol/L	6.82	(1.82-25.60)	0.004
Blood pH < 7.35	7.36	(1.94-27.86)	0.003
Embolus distribution region (multi-classification variable)	1.42	(0.92-1.74)	0.156
Embolus involvement length
20-50 mm (vs ≤ 20 mm)	1.09	(0.07-17.50)	0.951
≥ 50 mm (vs ≤ 20 mm)	3.14	(0.39-25.54)	0.284

The end point is death, and the comparison group is the survival group. Since the death number of many embolism distribution groups was 0, the dummy variable cannot be set for analysis, so it was included as a multi-classification variable in the cox regression model.