Cancer risks to spouses and offspring in the Family-Cancer Database.

Abstract:

:It is generally accepted that cancer is caused by environmental and inherited factors but these are only partially identified. Family studies can be informative but they do not separate shared lifestyles and genes. We estimate familial risks for concordant cancers between spouses in common cancers of both sexes in order to quantify cancer risks from the shared environment. The risks are compared to those seen between parents and offspring in order to estimate the inherited component. The nation-wide Family-Cancer Database was used as the source of family and cancer data. Standardized incidence ratios (SIRs) were calculated for concordant cancer in offspring by parental cancer and in spouses. Among the 23 cancer sites considered, all but two showed an increased SIR for offspring by father or mother. Only two sites, stomach and lung, showed an increase in SIR of concordant cancer among spouses. Additionally, pancreatic cancer and melanoma were increased in couples where at least one spouse was diagnosed before age 50. If both spouses presented melanoma before age 40, SIR was 3.82 for husbands. SIRs of colon, renal, and skin (squamous cell) cancers were unchanged by spouses' concordant cancer. Shared lifestyle among spouses seems to explain only a small proportion of cancer susceptibility. Because lifestyles are likely to differ more between parents and offspring than between spouses, familial cancer risks between parents and offspring are likely to be more due to heritable rather than environmental effects.

journal_name

Genet Epidemiol

journal_title

Genetic epidemiology

authors

Hemminki K,Dong C,Vaittinen P

doi

10.1002/1098-2272(200102)20:2<247::AID-GEPI7>3.0.C

subject

Has Abstract

pub_date

2001-02-01 00:00:00

pages

247-57

issue

2

eissn

0741-0395

issn

1098-2272

pii

10.1002/1098-2272(200102)20:2<247::AID-GEPI7>3.0.C

journal_volume

20

pub_type

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