Fig. 2From: Sex differences in patients with high risk HPV-associated and HPV negative oropharyngeal and oral cavity squamous cell carcinomasKaplan-Meier survival and number at risk a OP HPV-associated: p = 0.638, b OP HPV negative: p = 0.035, c OC HPV-associated: p = 0.049, d OC HPV negative: p < 0.001Back to article page