J S Mandel

..Both studies are derived primarily from the Agricultural Health Study (AHS). A review and evaluation is also provided on the AHS and several additional studies of paraquat and PD...

..However, the effect of screening on the incidence of colorectal cancer remains uncertain, despite the diagnosis and removal of precancerous lesions in many persons who undergo screening...

..plant through 1991 has been previously reported. This study updates that effort and presents an additional seven years of data and follow-up that provided 268 additional cohort members and 71 new deaths...

..Existing evidence does not point to any pesticide as satisfying widely used guidelines for establishing causation: a strong, exposure-dependent and demonstrably unconfounded, unbiased association, documented in several studies...

..These findings point to the need to validate assumptions about exposures in studies of people who are not directly involved in pesticide application...

..These results expand on our previous observations and as before the data fail to demonstrate any causal association between occupational PCB exposure and excess cancer mortality or any other causes of death...

..Chlorpyrifos exposure to farm family members from the observed application was largely determined by the extent of contact with the mixing, loading, and application process...

..g., farm families), the pharmacokinetics of the pesticide and the timing of exposure events and urine collection must be understood when relying on single voids as a surrogate for longer time-frames of exposure...

..0. No positive association of farm pesticide exposure and glioma was found. Other farm exposures may explain the excess brain cancer risk seen in previous studies...

..01). Although limited by small sample size, these findings indicate that the association between lycopene and prostate cancer is complex and may be modified by other antioxidants and by XRCC1 genotype...

..We estimated 2,4-dichlorophenoxyacetic acid (2,4-D) exposure and systemic dose in farm family members following an application of 2,4-D on their farm...

..To explore the hypothesis that a combination of several risk factors acting through the same pathway may produce an overall large increase in risk even in the presence of weak associations with each individual factor...

..Laboratory and epidemiological data suggest that folic acid may have an antineoplastic effect in the large intestine...

..Nevertheless, it is unclear whether such disparities are due to genetic alterations that are involved in prostate cancer initiation. Here, we evaluated chromosome 8p allelic loss in a racially diverse cohort...

..CONCLUSIONS: Our results demonstrate the importance of collecting type of pesticide formulation and suggest a generic exposure assessment is likely to result in appreciable exposure misclassification for many pesticides...

..Follow-up mortality data in this retrospective cohort study demonstrate that treatment with risedronate has no effect on overall mortality rates...

..The Farm Family Exposure Study was conducted to evaluate real-world pesticide exposure for farmers, spouses, and children...

..The long-term accumulation of negative, weak, and inconsistent findings suggests that TCDD eventually will be recognized as not carcinogenic for humans...

..Nonetheless, it is advisable to minimize exposure to pesticides, and this study did identify specific practices that could be modified to reduce the potential for exposure...

..Existing pathological markers can predict disease recurrence only to a certain extent, and there is a need for more accurate predictors...

..7; 95% confidence interval, 0.5-1.1). CONCLUSION: These results support the hypothesis that reproductive hormones play a role in the etiology of glioma among women...

..CONCLUSION: In this randomized controlled clinical trial, there was no increase in prostate cancer risk associated with calcium supplementation and some suggestion of a protective effect...

..Results show that exposure to pesticides was not associated with an increased risk of intracranial gliomas in women. Other farm-related factors could be etiologic factors and will be discussed in future reports...

..While the 2 week measurement does somewhat decrease exposure misclassification, its added intrusiveness and cost are likely to outweigh the improved precision...

..CONCLUSION: The Farm Family Exposure Study should provide insights about pesticide exposure under real world conditions and thereby facilitate improved exposure assessment in epidemiologic studies of agricultural populations...