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Epidemiology and risk factors of retinoblastoma in chongqing area

International Journal of Ophthalmology(English edition) 2016年第7期9卷 984-988页

作者： Yu-Qiong Yang Jia Li Hong-Feng Yuan Department of Ophthalmology Institute of Surgery ResearchDaping HospitalThird Military Medical UniversityChongqing 400042China

AIM： To investigate the risk factors of retinoblastoma in chongqing and offer the bases for scientific measures. METHODS： One hundred and thirty-three retinoblastoma patients were taken as case group, and 133 children were taken as control group in 1：1 ratio. The relevant factors were collected from a questionnaire survey which was made by our research group. First, Chi-square and t-test were used to discuss the various factors, and then the logistic regression analysis was made by statistics software SPSS17.0 based on the result of 266 people. RESULTS： Single factor analysis results showed the differences between the two groups were statistically significant （P〈0.05） in 17 factors which were education level of their parents, occupation of their parents, exposure to harmful chemicals of their parents 6mo before pregnancy, the history of pelvic inflammatory disease of mother before pregnancy, childbearing history of their parents, pregnant age of their parents, the medication history of father 6mo before pregnancy, living place of their parents, the pollution living place of mother, hobbies of their parents. Multivariate analysis showed that the living place of parents, mother who feed pets before pregnancy, and exposure to harmful chemicals of father before pregnancy were the independent risk factors of retinoblastoma （P〈0.05）. CONCLUSION： The living place of parents, mother who feed pets before pregnancy, exposure to harmful chemicals of father before pregnancy were the risk factors of retinoblastoma which affects the occurrence of retinoblastoma in a certain extent.

关键词： chongqing area retinoblastoma epidemiology risk factors

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Manganese Deposits and Environments Contaminated by Manganese Mine Tailings in chongqing area

Manganese Deposits and Environments Contaminated by Manganes...

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2011 IEEE International Conference on Waste Recycling,Ecology and Environment(ICWREE 2011)

作者： Minquan XIA* Lan CHEN Song XIAO Xuejuan DA Guiwen XU College of Petroleum Engineering chongqing University of Science and Technology chongqing 401331 P.R. China

The Chengkou and Xiushan Mn deposits of chongqing area are hosted by organic-rich black shales with higher MnCO3 contents between 33.00% and 82.35%. According to the geological settings and geochemistry, the metallogenesis of Neoproterozoic manganese related to the oceanic anoxic events and a particularly sharp solubility gradient exists along oxic-anoxic interface. The manganiferous stromalite has highest MnCO3 content with 82.35%, which indicates biological assistance in precipitation of manganese. The manganese mine tailings contain heavy metals such as Cu, Pb, Zn, Cr, Ti, Sb and U and contaminate the air, soil, and water, therefore, the governments must take more attention to environmental contamination by manganese mine tailings.

关键词： manganese deposits metallogenesis mine tailings chongqing area

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