Re: Relation of Body Mass Index to Outcome in Patients With Known or Suspected Coronary Artery Disease

MarilynMann <mannm@xxxxxxxxxxx> wrote in part:

Obese and very obese
patients had less than half the long-term mortality when compared with
normal BMI patients [hazard ratio (HR) 0.38, 95% confidence interval
(CI) 0.18-0.81, P = 0.012].

This is interesting. I wonder if there was a pre-selection effect in that
obese patients suffered more mortality prior to formation of the cohort.
Possibly, the more fragile obese patients died and were never included in
the study at all.

This may be similar to way some presumably bad things (like overweight) may
appear to confer a benefit in old age. One who is obese and survives to old
age may be pretty immune to the usual things that kill off the obese and
therefore may live longer than his skinny counterparts.
--
Jim Chinnis Warrenton, Virginia, USA
.

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