Table 1.

Patterns of first failure by treatment arm in the study cohort (N = 60)

Disease-related event(s) of interest	3D-CRTa (%) (n = 28)	IMRTb (%) (n = 32)
No documented disease-related event	18 (64.2%)	18 (56.3%)
Persistent primary site (local) disease	1 (3.6%)	1 (3.1%)
Persistent neck nodal (regional) disease	1 (3.6%)	0 (0%)
Primary site (local) recurrence	0 (0%)	2 (6.2%)
Neck nodal (regional) recurrence	1 (3.6%)	1 (3.1%)
Primary + nodal (loco-regional) recurrence	1 (3.6%)	2 (6.2%)
Isolated distant metastases	1 (3.6%)	0 (0%)
Distant + primary + nodal failure	1 (3.6%)	3 (9.4%)
Second new primary	4 (14.2%)	5 (15.7%)

^a 3D-CRT three-dimensional conformal radiotherapy, ^b IMRT intensity-modulated radiation therapy