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st: -stcurve- (-svy:stcox-)
From
"Muhuri, Pradip (SAMHSA/CBHSQ)" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: -stcurve- (-svy:stcox-)
Date
Sun, 4 Aug 2013 01:44:58 +0000
Dear Statalist,
I have used -svy:stcox- with attained age as the time scale (code not shown), and then plotted the survival curve and saved the results using the following code:
stcurve, surv at1(xspd2=1 xsmoke=3) at2(xspd2=2 xsmoke=3) range (18, 95) outfile ("G:\spd_no_spd_surv").
The data file provides me three variables namely, _t, surv2, and surv3.
I am looking for the sample code to calculate the following:
(1) the median survival times, that is, age at which (-t) half of the people survived (based on surv2 and surv3 as well); and
(2) the arithmetic mean of the survival times (-t) or life expectancy.
Any help will be highly appreciated.
Thanks,
Pradip
Pradip K. Muhuri, PhD
SAMHSA/CBHSQ
1 Choke Cherry Road, Room 2-1071
Rockville, MD 20857
Tel: 240-276-1070
Fax: 240-276-1260
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