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. Author manuscript; available in PMC: 2018 Apr 1.
Published in final edited form as: Ann Thorac Surg. 2017 Jan 19;103(4):1070–1075. doi: 10.1016/j.athoracsur.2016.09.053

Table 2.

Cox proportional hazards model for variables independently associated with overall survival. Inputs into the model included: age, gender, race, population status of zip code, income level, insurance status, Charlson/Deyo comorbidity score, induction radiation therapy status, early versus delayed surgery interval, extent of surgical resection, number of pathologically positive lymph nodes, surgical margins, thirty-day readmission status, and adjuvant therapy status.

Variable Hazard Ratio (95% CI) P value

Age (per year increase) 1.02 (1.01–1.03) <0.001

Caucasian race 0.74 (0.57–0.95)   0.02

Charlson-Deyo Score (ref: 0)
1 1.21 (1.03–1.43)   0.03
≥2 1.14 (0.83–1.56)   0.42

Positive Lymph Nodes (per node) 1.04 (1.01–1.06)   0.004

Delay ≥ 3 months in interval from induction therapy initiation to surgery 1.21 (1.04–1.43)   0.02

Positive surgical margins (≥R1) 1.73 (1.35–2.20) <0.001