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Relationship between anthropometric factors, radiation exposure, and colon cancer incidence in the Life Span Study cohort of atomic bomb survivors.
- Source :
-
Cancer causes & control : CCC [Cancer Causes Control] 2013 Jan; Vol. 24 (1), pp. 27-37. Date of Electronic Publication: 2012 Oct 21. - Publication Year :
- 2013
-
Abstract
- Purpose: We examined colon cancer risk in atomic bomb survivors to investigate whether excess body weight after the bombings alters sensitivity to radiation effects.<br />Methods: Of the 56,064 Japanese atomic bomb survivors with follow-up through 2002 with self-reported anthropometric data obtained from periodic mail surveys, 1,142 were diagnosed with colon cancer. We evaluated the influence of body mass index (BMI) and height on radiation-associated colon cancer risk using Poisson regression.<br />Results: We observed a similar linear dose-response relationship for the 56,064 subjects included in our analysis and the entire cohort of Japanese atomic bomb survivors [excess relative risk (ERR) per Gray (Gy) = 0.53, 95 % confidence interval (CI) 0.25-0.86]. Elevation in earliest reported BMI, BMI reported closest to colon cancer diagnosis, and time-varying BMI were associated with an elevated risk of colon cancer [relative risk (RR) per 5 kg/m(2) increase in BMI = 1.14, 95 % CI 1.03-1.26; RR = 1.16, 95 % CI 1.05-1.27; and RR = 1.15, 95 % CI 1.04-1.27, respectively]. Height was not significantly related to colon cancer risk. Inclusion of anthropometric variables in models had little impact on radiation risk estimates, and there was no evidence that sensitivity to the effect of radiation on colon cancer risk depended on BMI.<br />Conclusions: Radiation exposure and BMI are both risk factors for colon cancer. BMI at various times after exposure to the atomic bombings does not significantly influence the relationship between radiation dose and colon cancer risk, suggesting that BMI and radiation impact colon cancer risk independently of each other.
- Subjects :
- Age Distribution
Anthropometry
Carcinoma etiology
Cohort Studies
Colonic Neoplasms etiology
Environmental Exposure statistics & numerical data
Female
Humans
Incidence
Japan epidemiology
Longevity physiology
Longevity radiation effects
Male
Risk Factors
Body Weights and Measures statistics & numerical data
Carcinoma epidemiology
Colonic Neoplasms epidemiology
Environmental Exposure adverse effects
Neoplasms, Radiation-Induced epidemiology
Nuclear Weapons statistics & numerical data
Survivors statistics & numerical data
Subjects
Details
- Language :
- English
- ISSN :
- 1573-7225
- Volume :
- 24
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Cancer causes & control : CCC
- Publication Type :
- Academic Journal
- Accession number :
- 23085813
- Full Text :
- https://doi.org/10.1007/s10552-012-0086-8