Why is the PAR fraction less than the AR fraction? How do you think the PAR fra

timer Asked: Jan 30th, 2016

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Why is the PAR fraction less than the AR fraction?  How do you think the PAR fraction would be different if this study were done in the general population rather than in a population of veterans?

For #17 and #18 only, how closely does the odds ratio approximate the relative risk for smokers?  For former smokers?  Why? 

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