TABLE 3.

Univariate and multivariable Cox regression analysis for overall survival

	Univariate analysis		Multivariable analysis
Variable	HR (95% CI)	p value	HR (95% CI)	p value
Age	0.994 (0.982–1.007)	.358	–	–
Gender
Female	Reference		Reference
Male	1.344 (1.001–1.804)	.049	1.019 (0.694–1.496)	.925
Histology
Appendiceal	Reference		Reference
Colorectal	2.578 (1.915–3.471)	<.001	3.134 (2.002–4.905)	<.001
Tumor differentiation
Well	Reference		Reference
Moderate	3.537 (2.230–5.611)	<.001	2.611 (1.494–4.565)	.001
Poor	4.572 (2.810–7.328)	<.001	3.583 (2.061–6.229)	<.001
PCI	1.028 (1.009–1.047)	.004	1.043 (1.015–1.071)	.002
CCR
0	Reference		Reference
1	1.835 (1.339–2.516)	<.001	1.693 (1.050–2.730)	.031
Liver resection	2.037 (1.386–2.993)	<.001	1.728 (1.124–2.657)	.013

Abbreviations: CCR, completeness of cytoreduction score; CI, confidence interval; HR, hazard ratio; PCI, peritoneal carcinomatosis index.