| SUN Quanfu,AKIBA Suminori,TAO Zufan.Excess relative risk for solid cancer mortality during prolonged exposure to high-background natural radiation in Yangjiang area of China[J].Chinese Journal of Radiological Medicine and Protection,2002,22(1):51-54 |
| Excess relative risk for solid cancer mortality during prolonged exposure to high-background natural radiation in Yangjiang area of China |
| Received:March 30, 2001 |
| DOI： |
| KeyWords:Cohort study Cancer Low-dose Dose estimation Excess risk |
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| Abstract:: |
| Objective To estimate the excess relative risk for solid cancer associated with chronically exposure to high-background natural radiation in Yangjiang area of China. Methods Based on hamlet-specific environmental doses and sex-and age-specific occupancy factors,we calculated cumulative doses for each cohort member.Assuming a linear dose response relationship and using cancer mortality data for the period 1979-1995 and Poisson model,we estimated the excess relative risk(EER)for solid cancer. Results The ERR per Sv of all solid cancer is estimated to be -0.11(95% CI,-0.67,0.69 to 95%).The corresponding figures for cancers of liver,nasopharynx,lungs and stomach are -0.99(-1.60,0.10),0.10(-1.21,3.28),-0.68(-1.58,1.66) and -0.27(-1.37,2.69)respectively. Conclusion The association between ERR of solid cancer and dose can not be found. |
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