Cancer Risk following Residential Exposure to Airborne Polychlorinated Biphenyls: A Danish Register-Based Cohort Study
作者：Laura Deen, Karin Sørig Hougaard, A. J. Clark, Harald William Meyer, Marie Frederiksen, Lars Gunnarsen, Helle Vibeke Andersen, Thomas Hougaard, Kajsa Kirstine Ugelvig Petersen, Niels Erik Ebbehøj, Jens Peter Bonde, Sandra Søgaard Tøttenborg · 发表于：Environmental Health Perspectives · 年份：2022 · DOI：10.1289/ehp10605 · 被引用次数：25 · 研究领域：Toxic Organic Pollutants Impact、Carcinogens and Genotoxicity Assessment、Effects and risks of endocrine disrupting chemicals
Background: Polychlorinated biphenyls (PCBs) are biopersistent chemicals classified as human carcinogens. This classification is primarily based on evidence on higher-chlorinated PCBs found in food. The carcinogenic potential of airborne lower-chlorinated PCBs remains largely unexplored. Objectives: We aimed to investigate cancer risk following residential exposure to airborne PCBs. Methods: Cancer risk was examined in the Health Effects of PCBs in Indoor Air (HESPAIR) cohort of 38,613 residents of two partly PCB-contaminated residential areas in Greater Copenhagen, identified by nationwide registries. PCB exposure was based on relocation dates and indoor air PCB measurements in subsets of apartments. Cancer diagnoses were extracted from the Danish Cancer Registry for the follow-up period of 1970–2018. We estimated adjusted hazard ratios with time-varying cumulative exposure and a 10-y lag using Cox regression. Results: Overall risk of cancer was not associated with PCByear, [hazard ratio (HR) for high-exposed vs. low-exposed =0.98; 95% confidence interval (CI): 0.88, 1.09], but residents exposed to ≥3,000 ng/m3 PCB×year had higher risk of liver cancer (HR =2.81; 95% CI: 1.28, 6.15) and meningiomas (HR =3.49; 95% CI: 1.84, 6.64), with indications of exposure–response relationships. Results were suggestive of a higher risk of pancreatic cancer (HR =1.59; 95% CI: 0.95, 2.64) at the highest aggregated PCB level. For testis cancer, a higher risk was observed among residents expos...