Absence of HPV Infection Is Associated with Smoker Patients with Squamous Cell Carcinoma of the Oropharynx
Figure 1
Survival analysis of patients with and without the presence of virus, by the Kaplan-Meier method, and by means of the Log-Rank test Epi Info program version 3.5.4 (July 30, 2012). Analyses were performed on the whole cohort ((a); ) and on smoker patients ((b); ). Differences were considered significant when .
