Table 1.

Studies based on overall survival in squamous cell carcinoma of the oropharynx

	Site of cancer	2 years OS (%)	3 years OS (%)	5 years OS (%)
Zhen et al. [3]	Tongue base	48.7		27.8
Mak-Kregar et al. [4]	Tonsil			32
Johansen et al. [5]	Oropharynx			31
Makitie et al. [6]	Oropharynx		58	45
Hannisdal et al. [7]	Tonsil			34