Patient clinical characteristics.

Patient clinical characteristics.</p

Age at diagnosis in sample groups.

DNA positive group consists of samples tested positive for DNA and negative for RNA, while the RNA positive group tested positive for both DNA and RNA.</p

Characteristics of the study population.

Characteristics of the study population.</p

Univariate proportional hazard regression of patient survival for tested variables.

Univariate proportional hazard regression of patient survival for tested variables.</p

Overall survival of OPSCC patients based on HPV positivity, p16 data, and T and N classification.

Overall survival of OPSCC patients based on HPV positivity, p16 data, and T and N classification.</p

Overall survival of OPSCC patients based on the gender, age group at the time of diagnosis, smoking history and alcohol use.

Overall survival of OPSCC patients based on the gender, age group at the time of diagnosis, smoking history and alcohol use.</p

Multivariate proportional hazard regression models for tested variables.

Multivariate proportional hazard regression models for tested variables.</p

Overall survival of OPSCC patients based type of therapy, on 7th edition and 8th edition of staging guidelines and combined risk level (HPV status and T/N classification) based on those proposed by Ang et al. [24].

Overall survival of OPSCC patients based type of therapy, on 7th edition and 8th edition of staging guidelines and combined risk level (HPV status and T/N classification) based on those proposed by Ang et al. [24].</p