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Cohort Studies on Cancer Mortality Among Workers Exposed Only to Chrysotile Asbestos: a Meta-analysis

Biomedical and Environmental Sciences 2004年第4期17卷 459-468页

作者： LuLI TONG-DASUN XINGZHANG RUI-NANLAI XIU-YANGLI XUE-JINFAN kenjimorinaga InstituteofSocialMedicineandFamilyMedicine ZhejiangUniversityHangzhou310031ZhejiangChina InstituteofHygiene ZhejiangAcademyofMedicalSciencesHangzhou310013ZhejiangChina DepartmentofEpidemiologyandHealthStatistics SchoolofMedicineZhejiangUniversityHangzhou310031ZhejiangChina DepartmentofEpidemiologyandFieldResearch OsakaMedicalCenterforCancerandCardiovascularDiseasesOsaka537-8511Japan

Objective To determine whether there was excessive risk of cancer among workers exposed to chrysotile fiber alone by applying a meta-analysis technique. Methods All data meeting the criteria of cohort studies on cancer mortality among workers exposed only to chrysotile were incorporated into meta-analysis. Pooled standardized mortality ratios (SMRs) and their corresponding 95% confidence intervals (CIs) for main cancer sites were calculated using two approaches of unweighted ratio and random effect model. The heterogeneity and its sources of the results were examined with a Q-statistic and Z-score test. The dose-response effect as reflected in the percentage of all deaths due to mesothelioma served as a proxy measure of chrysotile exposure. Results A cohort of twenty six workers exposed to chrysotile alone was summarized. The significantly elevated meta-SMRs for all deaths (1.27), all cancers (1.28), cancers of respiratory organs (2.51), cancers of lung (2.35) and cancers of stomach (1.24) were observed. The significantly elevated meta-SMRs for lung cancer within occupational strata were observed among textile workers (3.55), asbestos product manufacturers (3.30), miners and millers (2.24), cement product workers (1.22), and for stomach cancer among asbestos product manufacturers (1.49). Meta-SMRs for cancers at other sites were not significant. Meta-SMR for lung cancer showed an increasing trend with an elevated percentage of all deaths from mesothelioma, but no such trend for stomach cancer. Conclusion There are excessive risks of lung cancer and mesothelioma among workers exposed to chrysotile fiber alone, and likely no convincing indication of an etiological association between chrysotile exposure and cancers at other sites.

关键词： Chrysotile asbestos Cancer Mortality Cohort study Meta-analysis

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Survey on the Mortality of Malignant Tumors in Female Workers with Manual Spinning of Asbestos

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浙江省医学科学院学报 2005年第2期16卷 6-8页

作者： ZhangXing SunTong-da ZhongHui-xian ShiNan-feng ZhuLi-qiu kenjimorinaga InstituteofHygiene ZhejiangAcademyofMedicalSciences HangzhouMunicipalCenterforDiseaseControlandPrevention CixiMunicipalCenterforDiseasaControlandPrevention NationalInstituteofIndustrialHeahh KawasakiJapan

To investigate the mortality of malignant tumor in female workers exposed to chrysotile *** A retrospective cohort study of female workers was conducted,who had been engaged in the manual spinning of chrysotile in family with more than one year between January 1,1960 and December 31,*** A total of 144 persons were found to be dead from *** them the most frequent was lung cancer(74), and the second liver cancer(27),and the third stomach cancer(18).Standardized mortality ratio(SMR)from total malingnant tumor and lung cancer were 1.16(P<0.05)and 4.17(P<0.01),respectively based on the control population of the same *** A significant excess death from lung cancer was found among female workers who had been exposed to chrysotile.

关键词：死亡率恶性肿瘤女性纺纱工人石棉职业卫生

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