. Author manuscript; available in PMC: 2013 Sep 1.

Published in final edited form as: Int J Cancer. 2011 Nov 19;131(5):1179–1186. doi: 10.1002/ijc.26500

Table 4.

Univariable and multivariable hazard ratios (HR) and 95% confidence intervals (CI) for overall mortality among the patients with cancer in oropharyngeal sites by combinations of HPV (all types combined) and smoking (SM) indicator status

Combinations	No.	Alive/ Deceased	Univariable HR (95% CI)	Multivariable^* HR (95% CI)
HPV (−) SM(+)	19	6/13	1.00 -	1.00 -
HPV(+) SM(+)	14	9/5	0.37 (0.13–1.06)	0.37 (0.12–1.09)
HPV (−) SM(−)	8	4/4	0.47 (0.15–1.45)	0.41 (0.13–1.30)
HPV(+) SM(−)	18	14/4	0.20 (0.06–0.61)	0.27 (0.08–0.98)
HPV(−) SM(?)	13	2/11	1.30 (0.57–2.89)	1.08 (0.43–2.72)
HPV(+) SM(?)	9	5/4	0.40 (0.13–1.23)	0.52 (0.14–1.91)

Adjusted for race and tumor stage (where in situ cases were combined into local stage).

? indicates unknown