Table 1 Characteristics of all patients (n = 182) (100%)

Age (years)

 Median (range)

49 (24–76)

 < 60

156

85.7

 ≥ 60

26

14.3

Gender

 Male

132

72.5

 Female

50

27.5

Smoking status

 Non-smoker

151

83

 Smoker

31

17

EBV status

 Positive

115

63.2

 Negative

67

36.8

Family history

 Yes

26

14.3

 No

156

85.7

Pathological type

 I

14

7.7

 II

41

22.5

 III

127

69.8

T-stage

 T1

24

13.2

 T2

53

29.1

 T3

72

39.6

 T4

33

18.1

N-stage

 N0

34

18.7

 N1

60

33

 N2

76

41.8

 N3

12

6.5

M-stage

 M0

178

97.8

 M1

4

2.2

Disease stage

 I

9

4.9

 II

35

19.2

 III

96

52.7

 IV

42

23.2

DFS (months)

 Median (range)

23.2 (4.6–156.3)

Treatment

 Induction chemotherapy

40

22

 Radiotherapy

11

6

 Radiochemotherapy

130

71.4

 Chemotherapy

1

0.6