Figure 5

Functional larynx survival rates of the high and low risk groups at 5 years were 22.5% and 72.5%, respectively. The high risk group was defined as those possessing two or more factors including GTV dose of more than 76 Gy, gross tumor more than 37 ml and/or primary tumor location other than pyriform sinus. The low risk group was defined as those with one or none of the above factors.