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st: RE: stci won't produce median values

From   "Kieran McCaul" <[email protected]>
To   <[email protected]>
Subject   st: RE: stci won't produce median values
Date   Mon, 11 Aug 2008 12:04:17 +0800

The median survival time is the time it takes for 50% of a cohort to
You will only get an estimate of this if at least 50% have died in the
course of follow-up.

Kieran McCaul MPH PhD
WA Centre for Health & Ageing (M573)
University of Western Australia
Level 6, Ainslie House
48 Murray St
Perth 6000
Phone: (08) 9224-2140
Phone: -61-8-9224-2140
email: [email protected] 

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Hugh Robinson
Sent: Monday, 11 August 2008 8:36 AM
To: Statalist
Subject: st: stci won't produce median values

I'm trying to produce median time to death values for various
covariates.  "Stci, by (sex) median" gives me male values only and no
standard error or 95%CI values.  "stci, by (sex) rmean" works fine.
Does median not work for right-censored data?


Hugh S Robinson Ph.D.
Postdoctoral Researcher
Wildlife Biology Program
College of Forestry and Conservation
University of Montana
Missoula, MT 59802
(406) 243-4128

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