Table 2 Demographics distribution by chemoradiotherapy response (Figs. 4 and 5)

Age

Years

58.5 (7.6)

61.7 (9.9)

0.26

Gender

Male

32

8

0.49

Female

7

3

Clinical stage

0/1

-

-

0.34

2

1

1

3

3

2

4

35

8

T stage

T1

5

1

0.95

T2

11

4

T3

9

2

T4

13

4

X

1

-

N stage

N0

3

3

0.31

N1

3

1

N2

31

7

N3

2

-

Disease site

Larynx

7

3

0.21

Oral cavity

-

1

Oropharynx

31

7

Unknown primary

1

-

ACE comorbidities Score

None

12

3

0.79

Mild

20

5

Moderate

6

2

Severe

1

1

BMI

Normal (15.5–24.9)

7

4

0.34

Overweight (25–29.9)

18

5

Obese (30 +)

14

2

HPV status

Negative

7

6

0.04

Positive

29

4

Unknown

3

1

Drinker

Never

-

1

0.16

Current

28

7

Former (quit > 12 months)

11

3

Smoker (cigarettes)

Never

11

-

0.14

Current

16

6

Former (quit > 12 months)

12

5