Table 4.

Two and 5 years disease specific and overall survival rates of the patients according to clinical and pathological factors.

	Disease specific survival rate (%)			Overall survival rate (%)
	2 years	5 years	p-Value	2 years	5 years	p-Value
Smoking						0.041
Yes	87.5	80.2	0.044	79.9	64.6
No	100	100		95.7	79.7
Comorbid disease						0.076
Absent	89.5	81	0.686	85.1	74.6
Present	88.4	85.6		76.2	57.1
Preoperative tracheotomy						0.67
Absent	90.5	84.5	0.206	84.1	71.5
Present	85.2	78.3		75.3	55.1
Tumor type						0.534
Classical	89.1	81.8	0.508	81.1	63.3
Basaloid	100	88.9		87.7	78.0
Papillary	100	100		82.4	66.7
Differentiation						0.955
Well	90.9	83.3	0.894	83.1	65.3
Moderate	89.0	80.5		81.9	60.7
Poor	91.8	85.8		78.2	67.1
Surgical margin						0.141
Negative	89.9	83.5	0.003	82.5	67.5
Positive	50	50		50	50
N stage						0.004
0	94.9	90.2	0.017	91.4	75.3
1	86	79.4		75.9	65.9
2	74.7	67.9		59.7	46.5
3	50	50		50	50
Soft tissue deposits						0.002
Present	74	49.4	0.041	78.6	16.4
Absent	90.3	84.8		84.3	71.2
Extracapsular spread						<0.001
Present	59.1	50.7	< 0.001	56.8	37.9
Absent	92.9	86.9		86.9	71.2
Conglomerated lymph nodes						0.025
Present	74.6	74.6	0.143	55.8	37.2
Absent	90.5	83.8		84.4	70.1
Perineural invasion						0.002
Present	82.7	72.3	0.105	67.6	45.5
Absent	90.5	84.9		85.2	71.9
Lymphovascular invasion						0.167
Present	92.3	76.9	0.848	75.2	53.7
Absent	88.6	82.9		82	67.7
Neck dissection type						<0.001
Selective	90.3	87.1	0.001	85.9	74.3
Comprehensive	78.5	37.2		51.1	12.1
Local recurrences						0.007
Present	50	40	<0.001	50	40
Absent	91.7	86		83.8	68.9
Regional recurrences						<0.001
Present	55	34.4	<0.001	55	24.1
Absent	92.7	88		84.5	71.8
Distant metastasis						<0.001
Present	51.4	27.4	<0.001	51.4	22.9
Absent	92.4	87.5		84.3	70.9