Table 1 Patient characteristics for 1-year testicular germ cell cancer survivors treated between 1976 and 2007 with primary surgery with/without radiotherapy

From: Risk of diabetes after para-aortic radiation for testicular cancer

Patient characteristic

Base cohort

Subcohorta

Diabetes after TC

 

N

%

N

%

N

%

All patients

2998

 

614

 

161

 

Histology

 Seminoma

2071

69.1

414

67.4

131

81.4

 Non-seminoma

927

30.9

200

32.6

30

18.6

Age at testicular cancer, years

 Median±IQR

33.3

27.9–39.0

33.3

28.0–39.0

37.4

32.1–42.0

 <30

1012

33.8

213

34.7

28

17.4

 30–40

1349

45.0

271

44.1

73

45.3

 40–50

637

21.3

130

21.2

60

37.3

Treatment period

 1976–1985

477

15.9

93

15.2

63

39.1

 1986–1995

916

30.6

216

35.2

50

31.1

 1995–2007

1605

53.5

305

49.7

48

29.8

Follow-up duration, years

 Median±IQR

13.4

8.3–20.5

14.6

9.6–21.3

14.3

8.9–21.1

 0–4 years

153

5.2

43

7.0

18

11.2

 5–9 years

641

21.4

126

20.5

36

22.4

 10–14 years

738

24.6

149

24.3

34

21.1

 15–19 years

578

19.3

107

17.4

23

14.3

 20–24 years

434

14.5

101

16.5

24

14.9

 25–29 years

243

8.1

52

8.5

16

9.9

 ≥30 years

211

7.0

36

5.9

10

6.2

Relapse, % yes

79

2.6

30

4.9

3

1.9

Treatment for TC (total treatment)

 Hemi-orchidectomy only

208

33.9

28

17.4

 Radiotherapy

406

66.1

133

82.6

RT field

      

 No PAO/ DL radiotherapyb

208

33.9

28

17.4

 Radiotherapy, PAO

164

26.7

39

24.2

 Radiotherapy, DL

229

37.3

87

54.0

 Unknown

13

2.1

7

3.7

Prescribed PAO-radiation dose

 No PAO radiotherapy b

208

33.9

28

17.4

 <26 Gray

86

14.0

34

21.1

 26–32 Gray

233

38.0

69

42.9

 ≥32 Gray

48

7.8

17

10.6

 Dose unknown

26

4.2

6

3.7

 Field unknown

13

2.1

7

4.3

Median dose (IQR)

  

26

26-26

26

25-30

Cardiovascular disease risk factors

      

BMI at TC diagnosis

 <30 kg/m2

215

35.0

57

34.4

 ≥30 kg/m2

21

3.4

15

9.3

 Unknown

378

61.6

89

55.3

Diabetes, % yesc

  

39

6.4

161

100

Diabetes type

      

 Insulin dependent

3

7.7

24

14.9

 Non-Insulin dependent

32

82.0

123

76.4

 Unknown type or treatment

4

10.3

14

8.7

Hypercholesterolemia at TC diagnosis

 Yes

5

0.8

3

1.9

 No

574

93.5

141

87.6

 Unknown

35

5.7

17

10.6

Hypertension at TC diagnosis

 Yes

10

1.6

9

5.6

 No

568

92.5

136

84.5

 Unknown

36

5.9

16

9.9

Smoking status at TC diagnosis

 Yes

181

29.5

55

34.2

 No

229

37.3

74

46.0

 Unknown

204

33.2

32

19.9

Vital status at date of last contact

 Alive

2884

95.6

587

95.6

135

83.9

 Died

97

3.2

22

3.6

26

16.2

 Emigrated

37

1.2

5

0.8

0

0

Age at end of follow-up

 Median±IQR

48.2

40.9–55.7

47.4

39.7–54.7

51.9

45.1–59.2

  1. PAO para-aortic field, DL Dog-Leg field, BMI body mass index (in kg/m2)
  2. aIn the subcohort 39 patients had developed diabetes (6.4% of subcohort)
  3. bincludes infradiaphragmatic fields other than para-aortic radiotherapy only or dog leg, i.e. iliac/inguinal or scrotal radiation fields.
  4. c7 of the 161 diabetes cases developed a pancreatic carcinoma before (N=2) around (N=4) or after (N=1) their diabetes diagnosis. Median time to diabetes was 17.8 years (IQR: 11.1–26.1) for these patients