[ RadSafe ] Re: Shipyard worker study

[welch at jlab.org]

I assumed that the SMR being equal to 1.00 was because it was simply
"defined" as the baseline.  In other words the non-exposed workers were
being defined as the "general population" to which the nukes were
compared. That sounds consistent with what Ruth Sponsler said.

Keith Welch

> "-it is seen that the Nones group has a SMR of 1.00. This means it exactly
> corresponds with the general population data - US B Vital Statistics"
> Hiserodt
>
>   The controls of the NSWS were like the exposed and the general
> population.
>   However, the rare mesthelioma deaths were 3-5 x for all, perhaps from
> asbestos exposure. They are so few (18, 8, 10 in >.5, <.5, No extra rem)
> that it does not affect this vast study with 2,797, 1,168 and 4,453
> deaths, respectively.
>
>   Howard Long
>