[ RadSafe ] Re: Shipyard worker study

[Maury Siskel]

Thanks loads for the information you've posted as well as for the really 
neat collection of citations.

Maury&Dog

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Ruth Sponsler wrote:

>Keith -
>
>Here are a few notes that I hope will be helpful -
>
>1. The NSWS did _not_ compare workers vs. non-workers.
> The reason is that there is a well-known phenomenon
>in epidemiology called the "healthy worker effect." 
>Basically, a sample of folks who go to work every day
>and live "normal lives" is a somewhat more selective
>  
>
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