Table 1.

Patient characteristics (n=1,331)

Characteristic	Value
Sex, No. (%)
Male	1133 (85.1)
Female	198 (14.9)
Age at first MBS, mean, y	60.2
Tumor site, No. (%)
OPC	1072 (80.5)
Oral cavity	8 (0.6)
Larynx	70 (5.3)
Hypopharynx	21 (1.6)
Nasopharynx	16 (1.2)
CUP/NOS	125 (9.4)
Other	19 (1.4)
Chemotherapy, No. (%)	907 (68.1)
Surgery, No. (%)	232 (17.4)
Radiation, No. (%)	1115 (83.8)
No treatment, No. (%)	12 (0.9)
Multimodality, No. (%)	933 (70.1)

Abbreviations: CUP, cancer unknown primary; MBS, modified barium swallow; NOS, not otherwise specified; OPC, oropharynx cancer