. Author manuscript; available in PMC: 2020 Jan 1.

Published in final edited form as: Pract Radiat Oncol. 2018 Sep 20;9(1):e83–e89. doi: 10.1016/j.prro.2018.09.001

Table 5.

Univariate and multivariate Cox regression models for overall survival using patient characteristics

Patient characteristic covariate	Univariate hazard ratio (95% CI)	Multivariate hazard ratio (95% CI)
Male sex	1.28 (1.05–1.57)^*	1.30 (1.05–1.62)^*
Stage T2 vs T1	1.50 (1.19–1.88)^*	1.40 (1.10–1.79)^*
Current smoker	1.18 (0.95–1.46)	NS
Central target location	1.16 (0.94–1.45)	NS
Age ≥75 vs age <75 y	1.23 (1.00–1.50)^*	NS
ECOG ≥1	1.66 (1.28–2.15)^*	1.60 (1.23–2.09)^*
Pack years	1.00 (0.997–1.003)	NS
BMI ≥23.3 vs BMI <23.3	0.71 (0.57–0.88)^*	0.68 (0.54–0.84)^*
FEV1 percent of predicted	0.994 (0.0994–0.999)^*	NS
Operability	0.66 (0.46–0.95)^*	NS

Abbreviations: BMI = body mass index; CI = confidence interval; ECOG = Eastern Cooperative Oncology Group; FEV1 = forced expiratory volume in 1 second

NS implies that the variable was not significant on multivariate regression and excluded from the model.

P < .05.