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

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

Variable Hazard Ratio 95% CI P valuea
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 < 0.0001b
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 < 0.0001c
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 < 0.0001d
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
  1. Dx, Diagnosis.
  2. a Partial likelihood ratio test.
  3. b Compared with white race.
  4. c Compared with married.
  5. d Compared with localized stage.