Abstract |
Five statistical procedures were used to partial the correlation between waterborne asbestos and digestive site cancer for the putative effects of population density. These include: analysis based on a data subset with roughly homogeneous population density; standard residual analysis (partial correlation); conditional probability integral transformation; analysis based upon ranked data, and use of logarithmic transformation. Nonparametric regression graphical techniques are applied to examine the nature or shape of the asbestos- cancer dose-response curve. Evidence is presented that suggests that there is considerable difference between analyses involving nonhigh-density tracts and non-San Francisco tracts. Evidence is also presented that the modal-type nonparametric regression curve forks or bifurcates when adjustment is made for population density.
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Authors | M E Tarter, R C Cooper, W R Freeman |
Journal | Environmental health perspectives
(Environ Health Perspect)
Vol. 53
Pg. 79-89
(Nov 1983)
ISSN: 0091-6765 [Print] United States |
PMID | 6662097
(Publication Type: Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, U.S. Gov't, P.H.S.)
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Chemical References |
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Topics |
- Asbestos
(adverse effects)
- California
- Digestive System Neoplasms
(epidemiology)
- Humans
- Population Density
- Risk
- Statistics as Topic
- Water Supply
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