In order to investigate an association between residential radon exposure and risk of lung cancer, a case-control study was conducted in Misasa Town, Tottori Prefecture, Japan. The case series consisted of 28 people w...
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In order to investigate an association between residential radon exposure and risk of lung cancer, a case-control study was conducted in Misasa Town, Tottori Prefecture, Japan. The case series consisted of 28 people who had died of lung cancer in the years 1976-96 and 36 controls chosen randomly from the residents in 1976, matched by sex and year of birth. Individual residential radon concentrations were measured for 1 year with alpha track detectors. The average radon concentration was 46 Bq/m(3) for cases and 51 Bq/m(3) for controls. Compared to the level of 24 or less Bq/m(3), the adjusted odds ratios of lung cancer associated with radon levels of 25-49, 50-99 and 100 or more Bq/m(3), were 1.13 (95% confidence interval;0.29-4.40), 1.23 (0.16-9.39) and 0.25 (0.03-2.33), respectively. None of the estimates showed statistical significance, due to small sample size. When the subjects were limited to only include residents of more than 30 years, the estimates did not change substantially. This study did not find that the risk pattern of lung cancer, possibly associated with residential radon exposure, in Misasa Town differed from patterns observed in other countries.
This paper explores the hypothesis that the level of education of children and their parents plays a major role in reducing child labour. Data were generated from a sample survey of 3809 children aged 10-14 years livi...
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This paper explores the hypothesis that the level of education of children and their parents plays a major role in reducing child labour. Data were generated from a sample survey of 3809 children aged 10-14 years living in 150 villages in two rural districts of Bangladesh. A significant inverse relationship was found between child labour and years of schooling. Age and education of children, parental education, land ownership of household and fathers' occupation were the determinants of child labour force participation. Child's years of schooling is the variable that has most influence on the probability of participation in the labour force, followed by father's and mother's education.
Abstract: Migrant farm workers play an essential role in the planting and harvesting of crops in our agricultural production system. In the United States today, about 6 percent of the paid farm labor force “follow th...
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