Table 1 Patient characteristics of elderly patients with cSCC of the head-and-neck region treated with radiotherapy between 2010 and 2019 (n = 69)

Sex

Male

39

56.5

Female

30

43.5

Age

mean (range)

84

66–99

65–80

20

29.0

 > 80

49

71.0

Presentation

Initial diagnosis

26

37.7

Local recurrence

30

43.5

Nodal recurrence

13

18.8

T stage

T1

11

15.9

T2

6

8.7

T3

14

20.3

T4

5

7.2

n/a

33

47.83

N stage

N0

23

33.3

N1

4

5.8

N2

10

14.5

N3

1

1.4

n/a

31

44.9

M stage

M0

23

33.3

M1

4

5.8

Mx

6

8.7

n/a

36

52.2

Grading

G1

6

8.7

G2

35

50.7

G3

19

27.5

n/a

9

13.0

R-status (if adjuvant)

R0

5

22.7

Rx

3

13.6

R1

10

45.5

R2

2

9.1

n/a

2

9.1

KPS

Median (range)

80%

(40–100%)

100–90%

17

24.6

80–70%

38

55.0

60–50%

8

11.6

 < 50%

3

4.3

n/a

3

4.3

CCI

Median (range)

6

(2–10)

 ≤ 4

16

23.2

5

15

21.7

6

19

27.5

7

17

24.6

 ≥ 8

2

2.9