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Table 2 Characteristics of 57 matched controls

From: Radiotherapy and subsequent thyroid cancer in German childhood cancer survivors: a nested case–control study

ICCC group

First cancer type

Controls n

RT+ n

Median age at diagnosis of FN (range)

I

Leukaemias

22

18

5 (1–14)

II

Lymphomas

12

7

9 (1–14)

III

CNS tumours

6

3

5.5 (4–13)

IV

Neuroblastoma

1

0

1 (−)

VI

Renal tumours

9

3

1 (1–12)

VII

Hepatic tumours

1

0

0 (−)

VIII

Bone tumours

1

1

3 (−)

IX

Soft tissue sarcomas

2

1

4.5 (4–5)

X

Germ cell tumours

2

0

1 (0–2)

 

Other non-malignant neoplasm

1

1

14 (−)

Total

All FNs

57

34

5 (0–14)

  1. CNS: central nervous system
  2. FN: first neoplasm
  3. ICCC: International Classification of Childhood Cancer
  4. RT+: radiotherapy received
  5. Characteristics of 57 matched controls by FN (ICCC-3 classification [1]) diagnosed in 1980–2000 in Germany, aged under 15 years