Laparoscopic versus open colectomy for colon cancer in an older population: a cohort study

Table 3 Univariate Predictors of Long-Term Survival in Overall Cohort

Variable	Hazard Ratio	95% CI	P value^a
Laparoscopic Colectomy	0.787	0.677-0.916	0.0012
Female Gender	0.936	0.905-0.968	0.0002
Black Race	1.204	1.132-1.280	< 0.0001^b
Other Race	0.886	0.825-0.952
Emergent Presentation	1.874	1.751-2.006	< 0.0001
Weekend Admission	1.120	1.070-1.173	< 0.0001
Large Metro Area	1.085	1.049-1.123	< 0.0001
Left-sided Tumor	0.935	0.903-0.968	0.0001
California Registry	1.005	0.967-1.044	0.8065
Disabled	1.268	1.189-1.352	< 0.0001
Positive Nodes	2.337	2.259-2.417	< 0.0001
Teaching Hospital	0.981	0.948-1.014	0.2564
Separated/Not Married	1.385	1.338-1.433	< 0.0001^c
Marital Status Unknown	1.171	1.069-1.283
Chemotherapy Receipt	0.923	0.889-0.959	< 0.0001
Regional Stage Disease	1.686	1.620-1.755	< 0.0001^d
Distant Stage Disease	6.33	6.043-6.637
Urban Hospital	1.013	0.964-1.064	0.6085
NCI Cancer Center	0.854	0.767-0.950	0.0028
Age at dx (1-year change)	1.050	1.048-1.053	< 0.0001
Year of dx relative to 1996	0.995	0.986-1.004	0.3220
Census tract median income ($1,000 change)	0.997	0.997-0.998	< 0.0001
Census tract % high school only education	1.003	1.001-1.004	0.0012
Census tract density (1,000 persons/unit change)	1.005	1.003-1.007	< 0.0001
Charlson index (1-unit change)	1.244	1.225-1.264	< 0.0001

ISSN: 1477-7819