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@gbj_tester
No, both healthy non-smokers non-drinkers, no family history to bring in to the calculation. I have a rough notion of how to start calculating, but not sure how the Reverend Bayes might rear his ugly head. Clearly with her greater life expectancy and his 10 year head start, I'm expecting a number between 0.5 and 1, but was wondering how close to 1 it would be.