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

Table 3.

Cox multivariate model adjusted for the impact of covariates on the risk of dying (HR) for patients who underwent esophageal resection for cancer by period of surgery

	HR	95% CI
Univariate
1990–1994	1.00
1995–1999	0.89	0.69–1.14
2000–2004	0.66	0.50–0.86
Adjusted for stage^a and comorbidity^a
1990–1994	1.00
1995–1999	0.82	0.61–1.11
2000–2004	0.57	0.42–0.77
Adjusted for stage^a, comorbidity^a, and surgical approach^a
1990–1994	1.00
1995–1999	0.85	0.62–1.15
2000–2004	0.60	0.43–0.84
Adjusted for stage^a, comorbidity^a, surgical approach^a, and neoadjuvant treatment^a
1990–1994	1.00
1995–1999	0.85	0.63–1.16
2000–2004	0.61	0.44–0.86

HR hazard ratio, CI confidence interval

^a“Unknown” categories excluded