title: POP exposure from fish liver consumption and risk of cancer--the Norwegian Women and Cancer Study.
abstract: The aim of the study was to investigate the hypothesis that consumption of fish liver increases cancer risk in humans due to increased intake of persistent organic pollutants (POPs). This study is based on data from the Norwegian Women and Cancer Study (NOWAC). The study has a prospective cohort design with questionnaire data from 64 285 randomly selected Norwegian women (aged 40-70 at baseline) and linkage to the Norwegian Cancer Registry. Cox proportional hazards regression was used to calculate risk ratios associated with consumption of fish liver and total cancer and cancer in breast, uterus, and colon. Fish liver consumption was, after adjusting for known risk factors, associated with a significant reduced risk for total cancer (RR = 0.92, 95% CI: 0.85, 0.99), and non-significant reduced risk for breast cancer (RR = 0.90, 95% CI: 0.78, 1.04), and colon cancer (RR = 0.82, 95% CI: 0.63, 1.07). Relative risk for uterus cancer was 0.82 (95% CI: 0.61-1.12). No significant dose-response effect was found for frequency of fish liver consumption (when divided into three intake groups) and total cancer, nor for any of the other cancer sites.We have concluded that in Norwegian women, fish liver consumption was not associated with an increased cancer risk in breast, uterus, or colon. In contrast, a decreased risk for total cancer was found.
authors.affiliation: Institute of Community Medicine, University of Tromsø, N-9037 Tromsø, Norway. magritt.brustad@ism.uit.no
authors.forename: Magritt
authors.initials: M
authors.lastname: Brustad
authors.forename: Torkjel Manning
authors.initials: TM
authors.lastname: Sandanger
authors.forename: Vegard
authors.initials: V
authors.lastname: Andersen
authors.forename: Eiliv
authors.initials: E
authors.lastname: Lund
mesh_terms: D000328:Adult; D000368:Aged; D000818:Animals; D001943:Breast Neoplasms / Q000453:epidemiology* / Q000209:etiology; D003110:Colonic Neoplasms / Q000453:epidemiology* / Q000209:etiology; D004034:Diet Surveys; D004781:Environmental Exposure; D005260:Female; D005399:Fishes; D005506:Food Contamination; D006801:Humans; D008099:Liver; D008875:Middle Aged; D009664:Norway / Q000453:epidemiology; D012306:Risk; D014594:Uterine Neoplasms / Q000453:epidemiology* / Q000209:etiology; D014874:Water Pollutants, Chemical
chemical_list: D014874:Water Pollutants, Chemical