TY - JOUR
T1 - Radiological surveillance of formerly asbestos-exposed power industry workers: rates and risk factors of benign changes on chest X-ray and MDCT
AU - Eisenhawer, Christian
AU - Felten, Michael K.
AU - Tamm, Miriam
AU - Das, Marco
AU - Kraus, Thomas
PY - 2014/4/29
Y1 - 2014/4/29
N2 - Background: To determine the prevalence of asbestos-related changes on chest X-ray (CXR) and low dose multidetector-row CT (MDCT) of the thorax in a cohort of formerly asbestos exposed power industry workers and to assess the importance of common risk factors associated with specific radiological changes. Methods: To assess the influence of selected risk factors (age, time since first exposure, exposure duration, cumulative exposure and pack years) on typical asbestos related radiographic changes, we employed mu logistic regression and receiver operating characteristic (ROC) analysis. Results: On CXR, pleural changes and asbestosis were strongly associated with age, years since first exposure and exposure duration. The MDCT results showed an association between asbestosis and age and between plaques and exposure duration, years since first exposure and cumulative exposure. Parenchymal changes on CXR and MDCT, and diffuse pleural thickening on CXR were both associated with smoking. Using a cut off of 55 years for age, 17 years for exposure duration and 28 years for latency, benign radiological changes in the cohort with CXR could be predicted vvith a sensitivity of 82.0% for all of the three variables and a specificity of 47.4%, 39.0% and 40.6%, respectively. Conclusions: Participants aged 55 years and older and those with an asbestos exposure of at least 17 years or 28 years since first exposure should he seen as having an increased risk of abnormal radiological findings. For implementing a more focused approach the routine use of low dose MDCT-rather than CXR at least for initial examinations would be justified.
AB - Background: To determine the prevalence of asbestos-related changes on chest X-ray (CXR) and low dose multidetector-row CT (MDCT) of the thorax in a cohort of formerly asbestos exposed power industry workers and to assess the importance of common risk factors associated with specific radiological changes. Methods: To assess the influence of selected risk factors (age, time since first exposure, exposure duration, cumulative exposure and pack years) on typical asbestos related radiographic changes, we employed mu logistic regression and receiver operating characteristic (ROC) analysis. Results: On CXR, pleural changes and asbestosis were strongly associated with age, years since first exposure and exposure duration. The MDCT results showed an association between asbestosis and age and between plaques and exposure duration, years since first exposure and cumulative exposure. Parenchymal changes on CXR and MDCT, and diffuse pleural thickening on CXR were both associated with smoking. Using a cut off of 55 years for age, 17 years for exposure duration and 28 years for latency, benign radiological changes in the cohort with CXR could be predicted vvith a sensitivity of 82.0% for all of the three variables and a specificity of 47.4%, 39.0% and 40.6%, respectively. Conclusions: Participants aged 55 years and older and those with an asbestos exposure of at least 17 years or 28 years since first exposure should he seen as having an increased risk of abnormal radiological findings. For implementing a more focused approach the routine use of low dose MDCT-rather than CXR at least for initial examinations would be justified.
KW - Asbestos
KW - Power industry
KW - Chest X-ray
KW - Early detection
KW - MDCT
U2 - 10.1186/1745-6673-9-18
DO - 10.1186/1745-6673-9-18
M3 - Article
C2 - 24808921
SN - 1745-6673
VL - 9
JO - Journal of Occupational Medicine and Toxicology
JF - Journal of Occupational Medicine and Toxicology
IS - 1
M1 - 18
ER -