Tahir Taj1, Aslak Harbo Poulsen2, Matthias Ketzel3,4, Camilla Geels3, Jørgen Brandt3, Jesper Heile Christensen3, Ulla Arthur Hvidtfeldt2, Mette Sørensen2,5, Ole Raaschou-Nielsen2,3. 1. Danish Cancer Society Research Center, Diet, Genes and Environment Strandboulevarden 49, 2100, Copenhagen, Denmark. tahir@cancer.dk. 2. Danish Cancer Society Research Center, Diet, Genes and Environment Strandboulevarden 49, 2100, Copenhagen, Denmark. 3. Department of Environmental Science, Aarhus University, Roskilde, Denmark. 4. Global Centre for Clean Air Research (GCARE), University of Surrey, Guildford, UK. 5. Department of Natural Science and Environment, Roskilde University, Roskilde, Denmark.
Abstract
PURPOSE: The etiology of Hodgkin lymphoma (HL) is obscure. Research on air pollution and risk of HL provides inconsistent results. We aimed to investigate the association between long-term residential exposure to air pollution and risk of adult Hodgkin lymphoma in Denmark. METHODS: We performed a nationwide register-based case-control study, including all (n = 2,681) Hodgkin lymphoma cases registered in the nationwide Danish Cancer Registry between 1989 and 2014. We randomly selected 8,853 age- and sex-matched controls from the entire Danish population using the Civil Registration System, and identified 20-year residential address history for all cases and controls. We modeled outdoor air pollution concentrations at all these addresses using the high-resolution multiscale air pollution model system DEHM/UBM/AirGIS. We used conditional logistic regression to estimate odds ratios adjusted for individual and neighborhood level sociodemographic variables. RESULTS: There was no association between 1, 5, 10, and 20 years' time-weighted average exposure to fine particles (PM2.5), O3, SO2, NO2, or the PM2.5 constituents OC, NH4, NO3, and SO4 and risk of Hodgkin lymphoma. CONCLUSION: Residential exposure to ambient air pollution does not seem to increase the risk of developing Hodgkin lymphoma.
PURPOSE: The etiology of Hodgkin lymphoma (HL) is obscure. Research on air pollution and risk of HL provides inconsistent results. We aimed to investigate the association between long-term residential exposure to air pollution and risk of adult Hodgkin lymphoma in Denmark. METHODS: We performed a nationwide register-based case-control study, including all (n = 2,681) Hodgkin lymphoma cases registered in the nationwide Danish Cancer Registry between 1989 and 2014. We randomly selected 8,853 age- and sex-matched controls from the entire Danish population using the Civil Registration System, and identified 20-year residential address history for all cases and controls. We modeled outdoor air pollution concentrations at all these addresses using the high-resolution multiscale air pollution model system DEHM/UBM/AirGIS. We used conditional logistic regression to estimate odds ratios adjusted for individual and neighborhood level sociodemographic variables. RESULTS: There was no association between 1, 5, 10, and 20 years' time-weighted average exposure to fine particles (PM2.5), O3, SO2, NO2, or the PM2.5 constituents OC, NH4, NO3, and SO4 and risk of Hodgkin lymphoma. CONCLUSION: Residential exposure to ambient air pollution does not seem to increase the risk of developing Hodgkin lymphoma.