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71.
Epidemiological survey of 573 families, clinical examination of 2593 persons, and X-ray examination of 1136 persons (in 16 typical endemic villages) were conducted, based on the classification of endemiology for KBD disease areas, i.e, mountain type, loess plateau type, plateau type, and flatlands type. It was revealed that the KBD disease areas exhibited the regular pattern of corming-into-being, development and passing-away and the characteristics of growth and decline. Further, it was found clinically that the disease areas may be divided into 4 types, i.e., recent onset, developing, stable, and historical. This division is simple and easy, practical, scientific, and reliable and can be applied by medical personnel at different levels. 相似文献
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74.
A result that application of sodium selenite or fly ash to some of soilin loess plateau can increase Se content in wheat grain has been demonstrated by the pot and field experiments, and added Se in soil can last its availability for 3 years. So this is a good measure for improving the low Se soils and preventing the Kaschin-Beck disease. 相似文献
75.
Hurler's disease was excluded in a fetus at 23 weeks' gestation by demonstrating normal iduronidase activity in fetal leucocytes following failure of amniotic cell culture after amnic-centesis at 16 and 19 weeks' gestation. The diagnosis was confirmed in the neonate. 相似文献
76.
目的 识别和分析该项目在生产过程、劳动过程和生产环境中可能存在的职业病危害因素及其种类,评估其产生的部位、强度以及可能造成的职业病危害及其程度,论证建设项目可行性研究报告中涉及职业卫生篇章的深度及职业病危害防护措施的可行性、有效性、合理性.方法 选择与本项目类似的工程作为类比项目,采用类比调查法和经验法进行评价.结果 本项目生产过程中可能产生苯、甲苯、乙苯、苯乙烯、噪声等职业病危害因素,属严重职业病危害项目.工程选址、总体布局、采光与照明等符合国家有关规定,具有较完善的职业危害管理措施,装置现场职业病危害防护设施及应急事故处理设施有待完善.结论 本项目在生产过程中可能产生的职业病危害是可以预防的,从职业卫生角度分析本项目是可行的. 相似文献
77.
Truncus arteriosus (TA) is a rare cardiac anomaly constituting less than 1% of all congenital heart defects. Its association with complete atrioventricular septal defect (AVSD) is extremely unusual and only 12 cases diagnosed postnatally or postmortem have been reported so far. We describe the first case of truncus arteriosus with AVSD to be diagnosed prenatally by fetal echocardiography. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
78.
In many calculations of attributable risk (AR), there are a number of parameters (excess risks, exposure rates, and so on) that are not known accurately, and one should take into account the variability in these parameters in determining a range of ‘plausible values’ of the attributable number (AN) of incidences due to the exposure. This is often done through simple tabulation of extreme combinations of the factors, but this can give a spurious picture of the real dimensions of the attributable risk. In this paper we describe graphical displays leading to more accurate evaluations of the AN range using multiple box plots, and a multiple regression approach to deciding on the most sensitive parameters for display in this way. The methods are illustrated by giving calculations of the ANs for lung cancer and for heart disease attributed to exposure to active and passive smoking. These expand analyses previously given by the United States EPA, the Australian NH&MRC and the United States OSHA.© 1997 John Wiley & Sons, Ltd. 相似文献
79.
Bayes and empirical Bayes methods have proven effective in smoothing crude maps of disease risk, eliminating the instability of estimates in low‐population areas while maintaining overall geographic trends and patterns. Recent work applies these methods to the analysis of areal data which are spatially misaligned, i.e., involving variables (typically counts or rates) which are aggregated over differing sets of regional boundaries. In this paper we extend this hierarchical modeling approach to the spatio‐temporal case, so that misalignment can arise either within a given timepoint, or across timepoints (as when the regional boundaries themselves evolve over time). Implemented using Markov chain Monte Carlo computing methods, our approach sensibly combines the relevant data sources and imposes the necessary constraints over the misaligned regional grids. We illustrate the method through an analysis of the dataset that motivated the method, which relates traffic density to pediatric asthma hospitalizations in San Diego County, California. We compare two different measures of the traffic covariate (neither of which is aligned with the zip code‐level asthma data), mapping the resulting fitted risk estimates in the Geographic Information System (GIS) ARC/INFO . Results in both cases are consistent with those of several previous authors who have investigated the traffic–asthma link. Copyright © 2000 John Wiley & Sons, Ltd. 相似文献
80.
Norovirus Detection in Groundwater 总被引：2，自引：0，他引：2