TY - JOUR
T1 - A prospective study of organochlorines in adipose tissue and risk of non‑Hodgkin lymphoma
AU - Bräuner, Elvira Vaclavik
AU - Sørensen, Mette
AU - Gaudreau, Eric
AU - LeBlanc, Alain
AU - Eriksen, Kirsten Thorup
AU - Tjønneland, Anne
AU - Overvad, Kim
AU - Raaschou-Nielsen, Ole
PY - 2012/1
Y1 - 2012/1
N2 - BACKGROUND: Exposure to organochlorines has been examined as a potential risk factor for non-Hodgkin lymphoma (NHL), with inconsistent results that may be related to limited statistical power or to imprecise exposure measurements.OBJECTIVE: Our purpose was to examine associations between organochlorine concentrations in prediagnostic adipose tissue samples and the risk of NHL.METHODS: We conducted a case–cohort study using a prospective Danish cohort of 57,053 persons enrolled between 1993 and 1997. Within the cohort we identified 256 persons diagnosed with NHL in the population-based nationwide Danish Cancer Registry and randomly selected 256 subcohort persons. We measured concentrations of 8 pesticides and 10 polychlorinated biphenyl (PCB) congeners in adipose tissue collected upon enrollment. Associations between the 18 organochlorines and NHL were analyzed in Cox regression models, adjusting for body mass index.RESULTS: Incidence rate ratios and confidence intervals (CIs) for interquartile range increases in concentrations of dichlorodiphenyltrichlorethane (DDT), cis-nonachlor, and oxychlordane were 1.35 (95% CI: 1.10, 1.66), 1.13 (95% CI: 0.94, 1.36), and 1.11 (95% CI: 0.89, 1.38), respectively, with monotonic dose–response trends for DDT and cis-nonachlor based on categorical models. The relative risk estimates were higher for men than for women. In contrast, no clear association was found between NHL and PCBs.CONCLUSION: We found a higher risk of NHL in association with higher adipose tissue levels of DDT, cis-nonachlor, and oxychlordane, but no association with PCBs. This is the first study of organochlorines and NHL using prediagnostic adipose tissue samples in the exposure assessment and provides new environmental health evidence that these organochlorines contribute to NHL risk.
AB - BACKGROUND: Exposure to organochlorines has been examined as a potential risk factor for non-Hodgkin lymphoma (NHL), with inconsistent results that may be related to limited statistical power or to imprecise exposure measurements.OBJECTIVE: Our purpose was to examine associations between organochlorine concentrations in prediagnostic adipose tissue samples and the risk of NHL.METHODS: We conducted a case–cohort study using a prospective Danish cohort of 57,053 persons enrolled between 1993 and 1997. Within the cohort we identified 256 persons diagnosed with NHL in the population-based nationwide Danish Cancer Registry and randomly selected 256 subcohort persons. We measured concentrations of 8 pesticides and 10 polychlorinated biphenyl (PCB) congeners in adipose tissue collected upon enrollment. Associations between the 18 organochlorines and NHL were analyzed in Cox regression models, adjusting for body mass index.RESULTS: Incidence rate ratios and confidence intervals (CIs) for interquartile range increases in concentrations of dichlorodiphenyltrichlorethane (DDT), cis-nonachlor, and oxychlordane were 1.35 (95% CI: 1.10, 1.66), 1.13 (95% CI: 0.94, 1.36), and 1.11 (95% CI: 0.89, 1.38), respectively, with monotonic dose–response trends for DDT and cis-nonachlor based on categorical models. The relative risk estimates were higher for men than for women. In contrast, no clear association was found between NHL and PCBs.CONCLUSION: We found a higher risk of NHL in association with higher adipose tissue levels of DDT, cis-nonachlor, and oxychlordane, but no association with PCBs. This is the first study of organochlorines and NHL using prediagnostic adipose tissue samples in the exposure assessment and provides new environmental health evidence that these organochlorines contribute to NHL risk.
KW - Adipose Tissue/metabolism
KW - Aged
KW - Environmental Exposure
KW - Female
KW - Humans
KW - Hydrocarbons, Chlorinated/metabolism
KW - Incidence
KW - Lymphoma, Non-Hodgkin/chemically induced
KW - Male
KW - Middle Aged
KW - Pesticides/metabolism
KW - Polychlorinated Biphenyls/metabolism
KW - Prospective Studies
KW - Risk Assessment
U2 - 10.1289/ehp.1103573
DO - 10.1289/ehp.1103573
M3 - Journal article
C2 - 22328999
SN - 0091-6765
VL - 120
SP - 105
EP - 111
JO - Environmental Health Perspectives
JF - Environmental Health Perspectives
IS - 1
ER -