Table 1 Patient characteristics

Number

21

 mean (years)

58.7

  < 65

15 (71.4)

  ≥ 65

6 (28.6)

 Male

20 (95.2)

 Female

1 (4.8)

 Never

1 (4.8)

 Former^a

5 (23.8)

 Active

9 (42.9)

 Unknown

6 (28.6)

 Never

0 (0)

 Former^a

3 (14.3)

 Active

12 (57.1)

 Unknown

6 (28.6)

 Oropharynx

4 (19.0)

 Hypopharynx

10 (47.6)

 Larynx

7 (33.3)

 I

4 (19.0)

 II

2 (9.5)

 III

6 (28.6)

 IV

9 (42.9)

 upper

0 (0)

 middle

15 (71.4)

 lower

6 (28.6)

 I

1 (4.8)

 II

15 (71.4)

 III

5 (23.8)

 IV

0 (0)