1.Indoor Radon Survey in 31 Provincial Capital Cities and Estimation of Lung Cancer Risk in Urban Areas of China.
Xiaoxiang MIAO ; Yinping SU ; Changsong HOU ; Yanchao SONG ; Bowei DING ; Hongxing CUI ; Yunyun WU ; Quanfu SUN
Biomedical and Environmental Sciences 2024;37(11):1294-1302
OBJECTIVE:
We aimed to analyze the current indoor radon level and estimate the population risk of radon-induced lung cancer in urban areas of China.
METHODS:
Using the passive monitoring method, a new survey on indoor radon concentrations was conducted in 2,875 dwellings across 31 provincial capital cities in Chinese mainland from 2018 to 2023. The attributable risk of lung cancer induced by indoor radon exposure was estimated based on the risk assessment model.
RESULTS:
The arithmetic mean (AM) and geometric mean (GM) of indoor radon concentrations were 65 Bq/m³ and 55 Bq/m³, respectively, with 13.6% of measured dwellings exceeding 100 Bq/m³ and 0.6% exceeding 300 Bq/m³. The estimated number of lung cancer deaths induced by indoor radon exposure was 150,795, accounting for 20.30% (95% CI: 20.21%-20.49%) of the lung cancer death toll.
CONCLUSION
This study provided the most recent data on national indoor radon levels in urban areas and the attributable risk of lung cancer. These results served as an important foundation for further research on the disease burden of indoor radon exposure and radon mitigation efforts.
Radon/analysis*
;
China/epidemiology*
;
Air Pollution, Indoor/analysis*
;
Lung Neoplasms/etiology*
;
Humans
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Cities/epidemiology*
;
Air Pollutants, Radioactive/adverse effects*
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Neoplasms, Radiation-Induced/etiology*
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Risk Assessment
;
Radiation Monitoring
3.A 20-year follow-up study on the effects of long-term exposure to thorium dust.
Xing'an CHEN ; Yonge CHENG ; Huijuan XIAO ; Guodong FENG ; Yunhui DENG ; Zhiliang FENG ; Lian CHEN ; Xuanmao HAN ; Yingjie YANG ; Zhihuan DONG ; Rong ZHEN
Chinese Medical Journal 2003;116(5):692-694
OBJECTIVETo investigate the possible effects of long-term exposure to dust containing thorium and thoron progeny on dust-exposed miners.
METHODSA negative, high voltage, exhaled thoron progeny measurement system was used to estimate the miners' thorium lung burden.
RESULTSThe highest thorium lung burden of 638 miners was 11.11 Bq. The incidence of stage 0(+) pneumoconiosis was higher among dust-exposed miners. Lung cancer mortality of the dust-exposed miners was significantly higher than that of controls (P < 0.005).
CONCLUSIONThere is a difference in cancer rates between those who have long-term exposure to dust containing thorium (in which carcinogenic ThO(2) and SiO(2) exist) and thoron progeny and those who have not.
Air Pollutants, Radioactive ; adverse effects ; Body Burden ; China ; epidemiology ; Dust ; Follow-Up Studies ; Humans ; Lung Neoplasms ; epidemiology ; Mining ; Occupational Diseases ; epidemiology ; Occupational Exposure ; adverse effects ; Thorium ; adverse effects
Result Analysis
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