Table 4.

Univariate Analysis of Factors on Overall Survival and Recurrence, N2b patients.

	Recurrence-free Survival	Overall Survival
	HR (95 % CI) (n = 71, 5 events)	HR (95 % CI) (n = 71, 8 events)
Age	1.01 (0.91, 1.11)	0.99 (0.91, 1.08)
Smoking Packs/Year
0	ref	ref
1–10	2.70 (0.17, 43.27)	5.05 (0.45, 55.72)
>10	2.89 (0.30, 27.78)	3.96 (0.44, 35.47)
Clinical Tumor (T) 7th Stage	–
1	–	ref
2	–	3.08 (0.37–25.67)
Tumor Size (cm)	0.88 (0.23, 3.29)	1.00 (0.37, 2.75)
Soft Palate/Base of Tongue
Extension
Yes	ref	ref
No	0.54 (0.09, 3.22)	0.81 (0.16, 4.22)
Nodal Size (cm)	0.98 (0.42, 2.25)	1.01 (0.49, 2.05)
Side(s) of Neck Irradiated
Bilateral	ref	ref
Ipsilateral	0.50 (0.84–3.01)	1.22 (0.27, 5.48)
Adjuvant Neck Dissection
No	ref	ref
Yes	0.57 (0.06, 5.15)	0.70 (0.13, 3.68)