Table 1. Clinical characteristics of HNSCC patients in a 13 years of follow-up cohort.

Characteristics	HNSCC male patients (n = 128)		P value
	Without SMs (n = 105)	With SMs (n = 23)
Age (years, mean ± SD)	51.3 ± 10.6	52.8 ± 12.2	0.56
Primary cancer site
Buccal	7 (30.4%)	48 (45.7%)	0.83
Tongue	9 (39.1%)	33 (31.4%)
Gum	3 (12.0%)	12 (11.4%)
Palate	2 (8.7%)	5 (4.8%)
Lip	1 (4.3%)	2 (1.9%)
Oropharynx	1 (4.3%)	2 (1.9%)
Hypopharynx	0 (0.0%)	1 (1.0%)
Larynx	0 (0.0%)	1 (1.0%)
Stage
I	4 (17.4%)	15 (14.3%)	0.79
II	3 (13.0%)	24 (22.9%)
III	6 (26.1%)	27 (25.7%)
IV	9 (39.1%)	38 (36.2%)
Radiotherapy
Yes	14 (60.9%)	71 (67.6%)	0.51
No	8 (34.8%)	27 (25.7%)
Chemotherapy
Yes	11 (47.8%)	58 (55.2%)	0.28
No	12 (52.2%)	43 (41.0%)
Recurrence
Yes	12 (52.2%)	27 (25.7%)	0.02
No	11 (47.8%)	78 (74.3%)
Fatality
Yes	7 (30.4%)	15 (14.3%)	0.06
No	16 (69.6%)	90 (85.7%)