Table 4. Univariate and multivariate analysis of associations between marital status and CSS for different tumor sites.

		Univariate analysis		Multivariate analysis
Tumor site/Variable	5-year CCS	Log rank χ2 test	P	HR (95% CI)	P
Gallbladder		32.220	< 0.001
Marital status					< 0.001
Married	20.4%			Reference
Widowed	18.6%			1.195 (1.119–1.276)	< 0.001
Never married	19.4%			1.120 (1.033–1.215)	0.006
Divorced/Separated	18.6%			1.075 (0.981–1.178)	0.122
Bile duct		257.23	< 0.001
Marital status					< 0.001
Married	12.0%			Reference
Widowed	7.1%			1.480 (1.406–1.558)	< 0.001
Never married	11.4%			1.137 (1.069–1.209)	< 0.001
Divorced/Separated	7.1%			1.247 (1.165–1.335)	< 0.001
Ampulla of Vater		60.189	< 0.001
Marital status					< 0.001
Married	37.2%			Reference
Widowed	25.7%			1.574 (1.399–1.770)	< 0.001
Never married	36.8%			1.075 (0.934–1.239)	0.313
Divorced/Separated	31.5%			1.108 (0.942–1.305)	0.216