Table 2:

Characteristics of Included Patients

Characteristic	Proportion of Patients	95% CI
Male	77.2%	74.0%−80.2%
Female	22.0%	19.1%−25.1%
Advanced-Stage (III-IV) Disease	89.6%	83.6%−94.3%
HPV-Positive	37.2%	17.4%−59.6%
HPV-Negative	36.9%	21.7%−53.5%
HPV-Unknown	34.5%	15.9%−56.1%
Tonsil Primary	55.1%	46.0%−64.0%
Lateral Pharyngeal Wall Primary	39.0%	13.2%−68.7%
Base of Tongue Primary	38.5%	30.7%−46.7%
Current/History of Alcohol Use	60.1%	46.3%−73.1%
No Alcohol Use	39.7%	26.8%−53.4%
Current/History of Tobacco Use	71.8%	61.2%−81.4%
No Tobacco Use	27.7%	18.3%−38.2%
Unknown Tobacco Use	6.1%	2.2%−11.8%