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- Path: sparky!uunet!uvaarpa!concert!duke!news.duke.edu!duke.edu!feh
- From: feh@duke.edu (Frank Harrell)
- Newsgroups: bit.listserv.stat-l
- Subject: comparing 2 groups with censored data and competing events
- Keywords: survival analysis
- Message-ID: <5343@news.duke.edu>
- Date: 15 Sep 92 15:18:30 GMT
- Sender: news@news.duke.edu
- Lines: 32
- Nntp-Posting-Host: biostat.mc.duke.edu
-
-
- I am involved in a study of critically ill patients for whom we
- wish to compare two groups with regard to the timing of
- "Do Not Resussitate" (DNR) orders. Not all patients had DNRs
- and many have died. The risk of DNR increases as the risk of
- death increases, hence there is informative censoring.
- In the spirit of the Mantel-Haenszel-logrank statistic (and
- related to the work of Pepe in Stat. in Med. and JASA), I can
- conceive of a cascade of 2x2 tables of the form:
-
- For the n patients still alive at time t,
- what is the fraction, in each treatment group,
- who had DNR before time t.
-
- Vary t from 0 to the largest follow-up time.
- I need assistance in combining these tables into a test
- statistic, or a pointer to an existing statistic suitable
- for comparing non-fatal endpoints in the presence of informative
- censoring (a terminating event, death).
-
- Frank Harrell
- Division of Biometry
- Duke U.
- Durham NC USA
- feh@biostat.mc.duke.edu (our mail header gives an erroneous address)
-
-
- --
- ----------------------------------------------------------------------------
- Frank E Harrell Jr feh@biostat.mc.duke.edu
- Associate Professor of Biostatistics
- Division of Biometry Duke University Medical Center
-