		No. = 52	P-value*
Age (<60 vs. >60 years)	Mean ± SD	61.85 ± 10.76	0.048
Grade	1	14 (26.9%)	0.604
	2	36 (69.2%)
	3	2 (3.8%)
T	1	24 (46.2%)	0.236
T	2	28 (53.8%)	0.236
Stage	I	24 (46.2%)	0.236
Stage	II	28 (53.8%)	0.236
Surgery	No	38 (73.1%)	0.401
Surgery	Yes	14 (26.9%)	0.401
Type of surgery	No	38 (73.1%)	0.090
	Bilateral vocal cords stripping	2 (3.8%)
	Excision	6 (11.5%)
	Laser cordectomy	2 (3.8%)
	Rt vertical hemilaryngectomy	2 (3.8%)
	Total laryngectomy	2 (3.8%)
Radiotherapy (RT)	No	4 (7.7%)	0.661
Radiotherapy (RT)	Yes	48 (92.3%)	0.661
Indication of RT	Adjuvant	10 (19.2%)	0.607
	Definitive	38 (73.1%)
	No	4 (7.7%)
RT dose (Gy)	Median (IQR)	66 (66 - 70)	0.171
Both surgery and RT	Radiotherapy	42 (80.8%)	0.485
Both surgery and RT	Surgery & radiotherapy	10 (19.2%)	0.485