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st: help ltable


From   "xaratzavara@mailbox.gr" <xaratzavara@mailbox.gr>
To   statalist@hsphsun2.harvard.edu
Subject   st: help ltable
Date   29 Nov 2005 18:42:51 +0200

hello everybody,

i want to conduct life table analysis for a patency rate (how long a stent of a patient remains patent). The end point is obstruction (instead of death at sulvival). So i have the patency(days) the "failure"(obstruction), while the lost to follow up patients are these which die in a specific interval.
for example if i want to produce a life table for the first 30 days:
"patency" "obstruction"      "survival"  "lost to follow up"
    28           1 (yes)          32              0
    15           0 (no)           15              1
    17           0                33              0--and not 1 because even his patency is 17 days he is still alive.
How can i produce a life table where the "lost to follow up" are defined not
of timevar=patency, but of survival<=patency?

THANKS A LOT!


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