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Cancer Causes & Control

, Volume 12, Issue 1, pp 13–21 | Cite as

A prospective study of obesity and cancer risk (Sweden)

  • Alicja Wolk
  • Gloria Gridley
  • Malin Svensson
  • Olof Nyrén
  • Joseph K. McLaughlin
  • Joseph F. Fraumeni
  • Hans-Olov Adami
Article

Abstract

Objective: We evaluated the relation between obesity and the risks for various forms of cancer.

Methods: In a population-based cohort of 28,129 hospital patients (8165 men, 19,964 women) with any discharge diagnosis of obesity (9557 only diagnosis, 5266 primary, 13,306 secondary) during 1965–1993, cancer incidence was ascertained through 1993 by record linkage to the nationwide Swedish Cancer Registry. Cancer risk was estimated using the standardized incidence ratio (SIR, with 95% confidence interval), which is the ratio of the observed number of cancers to that expected.

Results: Overall, a 33% excess incidence of cancer was seen in obese persons, 25% in men and 37% in women. Significant risk elevations were observed for cancers of the small intestine (SIR = 2.8; 95% CI 1.6–4.5), colon (1.3; 1.1–1.5), gallbladder (1.6; 1.1–2.3), pancreas (1.5; 1.1–1.9), larynx (2.1; 1.1–3.5), renal parenchyma (2.3; 1.8–2.8), bladder (1.2; 1.0–1.6), cervix uteri (1.4; 1.1–1.9), endometrium (2.9; 2.5–3.4), ovary (1.2; 1.1–1.5), brain (1.5; 1.2–1.9), and connective tissue (1.9; 1.1–3.0), and for lymphomas (1.4; 1.0–1.7), with higher risk observed for Hodgkin's disease only in men (3.3; 1.4–6.5) and for non-Hodgkin's lymphoma only in women (1.6; 1.2–2.1). The association of obesity with risk of breast, prostate and pancreas cancers was modified by age.

Conclusions: Obesity is associated with more forms of cancer than previously reported.

cohort neoplasms obesity 

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Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Alicja Wolk
    • 1
  • Gloria Gridley
    • 2
  • Malin Svensson
    • 1
  • Olof Nyrén
    • 1
  • Joseph K. McLaughlin
    • 3
  • Joseph F. Fraumeni
    • 2
  • Hans-Olov Adami
    • 1
  1. 1.Department of Medical EpidemiologyKarolinska InstitutetStockholmSweden
  2. 2.Division of Cancer Epidemiology and GeneticsNational Cancer InstituteBethesdaUSA
  3. 3.International Epidemiology Institute Ltd.RockvilleUSA

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