you've discovered the secret to immortality, carol. if you get scared half to death, you only have halfway to death to go. then, if you get scared half to death again, you've still got a quarter of the way to death to go. scared half to death again, and still an eighth of the way to go.

soooooo, the secret is to get scared half to death constantly ... that way, you'll never die!

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"The need to perform adjustments for covariates...weakens the findings." BMJ Clinical Evidence: Mental Health, (No. 11), p. 95.... It's that simple, guys: bad numbers make bad science.