Table 1.

Characteristics of adults up to the third degree of relation to 757 patients with pediatric cancer.

MenWomenAll relatives
Distribution of childhood cancer diagnoses, % (n)n (%)Average age at cutoff (years)n (%)Average age at cutoff (years)n (%)Average age at cutoff (years)
Leukemia, 33.7% (255)2,748 (50.7)47.52,676 (49.3)49.65,42448.5
CNS tumor, 20.7% (157)a1,721 (49.3)49.01,767 (50.7)49.43,48849.2
Lymphoma, 13.5% (102)1,084 (51.0)48.61,041 (49.0)50.02,12549.3
Wilms tumor, 6.7% (51)570 (50.6)47.0557 (49.4)49.81,12748.4
Soft-tissue sarcoma, 6.6% (50)566 (50.9)47.6547 (49.1)48.41,11348.0
Bone tumor, 7.1% (54)b501 (48.7)48.6528 (51.3)48.21,02948.4
Neuroblastoma, 4.0% (30)279 (51.6)47.5262 (48.4)48.854148.2
Histiocytosis, 2.2% (17)220 (52.8)45.5197 (47.2)48.241746.8
Germ-cell tumors, 1.8% (14)a145 (52.0)49.9134 (48.0)51.827950.8
Hepatic tumor, 1.2% (9)120 (52.6)51.5108 (47.4)54.422852.9
Retinoblastoma, 0.7% (5)62 (54.9)55.851 (45.1)58.711357.1
Carcinomas, 0.9% (7)a61 (45.9)45.772 (54.1)45.413345.5
Others, 0.8% (6)53 (44.9)44.065 (55.1)52.211848.5
Total, 100% (757)8,130 (50.4)48.18,006 (49.6)49.516,13648.8
Age at first diagnosis, years66.562.964.8
Cancer diagnoses, n1,2461,1622,408
Years at risk, years297,923.4308,634.2606,557.5
Cancer/1,000 years at risk, n4.183.763.97
  • aSignificantly lower than the Swedish Childhood Cancer Register.

  • bSignificantly higher than the Swedish Childhood Cancer Register.