Radon and COPD Mortality in the American Cancer Society Cohort

Overview

Journal Eur Respir J

Specialty Pulmonary Medicine

Date 2011 Oct 19

PMID 22005921

Citations 30

Authors

Michelle C Turner

Daniel Krewski

Yue Chen

C Arden Pope 3rd

Susan M Gapstur

Michael J Thun

Affiliations

Soon will be listed here.

Abstract

Although radon gas is a known cause of lung cancer, the association between residential radon and mortality from non-malignant respiratory disease has not been well characterised. The Cancer Prevention Study-II is a large prospective cohort study of nearly 1.2 million Americans recruited in 1982. Mean county-level residential radon concentrations were linked to study participants' residential address based on their ZIP code at enrolment (mean ± SD 53.5 ± 38.0 Bq · m(-3)). Cox proportional hazards regression models were used to estimate adjusted hazard ratios (HR) and 95% confidence intervals (CI) for non-malignant respiratory disease mortality associated with radon concentrations. After necessary exclusions, a total of 811,961 participants in 2,754 counties were included in the analysis. Throughout 2006, there were a total of 28,300 non-malignant respiratory disease deaths. Radon was significantly associated with chronic obstructive pulmonary disease (COPD) mortality (HR per 100 Bq · m(-3) 1.13, 95% CI 1.05-1.21). There was a significant positive linear trend in COPD mortality with increasing categories of radon concentrations (p<0.05). Findings suggest residential radon may increase COPD mortality. Further research is needed to confirm this finding and to better understand possible complex inter-relationships between radon, COPD and lung cancer.

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