. 2009 Apr 16;16(7):1789–1798. doi: 10.1245/s10434-009-0458-9

Table 4.

Cox multivariate model adjusted for the impact of covariates on the risk of dying (HR) for patients who underwent esophageal resection by period of surgery (patients who died in-hospital excluded)

	HR	95% CI
Univariate
1990–1994	1.00
1995–1999	0.87	0.64–1.20
2000–2004	0.66	0.48–0.91
Adjusted for stage^a
1990–1994	1.00
1995–1999	0.90	0.65–1.24
2000–2004	0.67	0.48–0.93
Adjusted for stage^a, age, and gender
1990–1994	1.00
1995–1999	0.88	0.64–1.22
2000–2004	0.67	0.48–0.93
Adjusted for stage^a, age, gender, and comorbidity^a
1990–1994	1.00
1995–1999	0.88	0.64–1.22
2000–2004	0.67	0.48–0.93
Adjusted for stage^a, age, gender, comorbidity^a, and surgical approach
1990–1994	1.00
1995–1999	0.92	0.66–1.29
2000–2004	0.75	0.52–1.07

HR hazard ratio, CI confidence interval

^a“Unknown” categories were excluded