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Re: Source of cancer data
From: "John Williams" <JohnWi@law.com>
> John Williams wrote:
>
> <<. . . the NCI funds a few states to track incidence data. . . .>>
>
> But not all, and as was pointed out previously, how could a sample of
> the population be more accurate than the entire population?
>
> Jack Earley
> Radiological Engineer
>
>
> Jack,
>
> Because the QUALITY of data is much better.
Good quality irrelevant data doesn't produce good results.
>As Smith and others have shown.
They didn't.
> If you want to use ecologic or aggregate data,
which Smith does.
> at least pick
> a state that has the most aggregates in the nation like Iowa.
Pick the whole nation!
>There is 1% of the population there with 99 counties. It has a SEER
> Registry and the highest radon in the U.S. This is quality
> information. The higher the quality information, the less you see
> Cohen's inverse association.
Wishful thinking. It's just a small study with poor dose data, which
eliminates the supposed advantage of a "case-control" study (has no
controlled cases!) And as you know, Cohen's much stronger analyses must
also find weak associations when there's small radon variation - since Iowa
is the worst state to assess radon dose-response! Strong results reflect
segregated low-dose and high-dose with large dose differences. Each sampling
in Iowa must produce a correlation that 'flops around.'
Regards, Jim
> John Williams
>
>
> Sent by Law Mail
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