Table 1: Characteristics of the 358 patients treated with IMRT.

Variable AJCC7
T3
()
T4
()
value

Age
50461860.191
 ≥5018108
Gender
 Female16870.462
 Male48207
N stage
 N014520.299
 N12093
 N22494
 N3655
Histologic type
 Poorly differentiated SCC582750.407
 Well-differentiated SCC619
Tumor volume
 ≤46.4 mL601590.000
46.4 mL4135
Chemotherapy
 None3180.315
 Concurrent or NACT or adjuvant1434
 Concurrent + NACT831
 Concurrent + adjuvant19
 NACT + adjuvant1478
 NACT + concurrent + adjuvant25124
Prescribed total dose
 <73.92 Gy572650.819
 ≥73.92 Gy729

SCC, squamous cell carcinoma; NACT, neoadjuvant chemotherapy.