Table 1.

Detailed description of demographics, treatment modalities, and histological differentiation according to therapy.

Characteristics	OP	OPRT	OPRCT
Gender	Male: 20 (76.9%) Female: 6 (23.1%)	Male: 24 (70.6%) Female: 10 (29.4%)	Male: 42 (82.4%) Female: 9 (17.6%)
Age (years)	Median: 55 Range: 40–69	Median: 54 Range: 37–78	Median: 54 Range: 36–73
Smoking	Smokers: 12 (15.4%), Nonsmokers: 4 (32.7%) n.a.: 10 (38.5%)	Smokers: 13 (38.2%),   Nonsmokers: 3 (8.8%) n.a.: 18 (49%)	Smokers: 18 (35.3%), Nonsmokers: 4 (7.8%) n.a.: 29 (56.8%)
Follow-up (years)	Median: 2.99 Range: 0.28–10.69	Median: 4.44 Range: 0.93–15.85	Median: 4.77 Range: 0.22–13.05
Localization	Base of the tongue: 5 (19.2%) Palatine tonsil: 9 (34.6%) Palatal arch 11 (42.3%) Oropharynx NOS: 1 (3.8%)	Base of the tongue: 8 (23.5%) Palatine tonsil: 18 (52.9%) Palatal arch 5 (14.7%) Oropharynx NOS: 3 (8.8%)	Base of the tongue: 13 (25.5%) Palatine tonsil: 31 (60.8%) Palatal arch 2 (3.9%) Oropharynx NOS: 5 (9.8%)
T-category	pT1: 17 (65.3%) pT2: 9 (34.6%)	pT1: 15 (44.1%) pT2: 19 (55.9%)	pT1: 21 (41.2%) pT2: 30 (58.8%)
Tumor-depth (mm)*	Median: 4 Range: 1–35	Median: 5 Range: 2–25	Median: 5 Range: 1–19
Tumor-size (mm)	Median: 21 Range: 6–37	Median: 22 Range: 5–40	Median: 22 Range: 7–38
N-category (pooled)	0: 69.2% 1: 19.2% 2: 11.5%	0: 44.1% 1: 20.6% 2: 35.3%	0: 9.8% 1: 23.5% 2: 66.7%
Neck dissection	Yes: 20 (76.9%) No: 6 (23.1%)	Yes: 34 (100%)	Yes: 51 (100%)
Surgical technique	TLM: 3 (11.5%) Electrocautery: 33 (89.5%)	TLM: 6 (17.6%) Electrocautery: 27 (79.5%) Combined: 1 (2.9%)	TLM: 10 (19.6%) Electrocautery: 40 (78.4%) Combined: 1 (2.0%)
Histological differentiation	G2: 20 (76.9%) G3: 6 (23.1%)	G1: 1 (2.9%) G2: 20 (61.8%) G3: 6 (35.3%)	G2: 27 (52.9%) G3: 24 (47.1%)

*Tumor-depth is a calculated function of tumor extent and depth of infiltration.

TLM: transoral laser microsurgery, RT: radiotherapy, and RCT: radiochemotherapy.