Table 4.

Outcome of Cox stepwise regression, multiple variable analysis

Variables	Hazard ratio	95% confidence interval	P
Age, years
≥60	3.256	1.023–10.360	0.046
<60
Histology
Squamous cell carcinoma	0.359	0.092–1.402	0.14
Other diagnoses
Disease-free interval, months
≥26	3.396	1.133–10.177	0.018
>26