Re: st: Re: problem with -artsurv-

[Michael McCulloch <mm@pinest.org>]

What I'm trying to figure out is the reason for the error message:

cesf not found
r(111);




> Works well for me:
>
> **************
> ART - ANALYSIS OF RESOURCES FOR TRIALS        (version 1.0.4, 13 January 2005)
>
> A sample size program by Abdel Babiker, Patrick Royston & Friederike Barthel,
> MRC Clinical Trials Unit, London NW1 2DA, UK.
>
> Type of trial                            Superiority - time-to-event outcome
> Statistical test assumed                 Unweighted logrank test (local)
> Number of groups                         2
> Allocation ratio                         Equal group sizes
>
> Total number of periods                  3
> Length of each period                    One year
>
> Survival probs per period (group 1)      0.794 0.630 0.500
> Survival probs per period (group 2)      0.841 0.707 0.595
> Number of recruitment periods            2
> Number of follow-up periods              1
> Method of accrual                        Uniform
> Recruitment period-weights               1 1 0
>
> Hazard ratios as entered (groups 1,2)    1, 0.75
> Alpha                                    0.050 (two-sided)
> Power (designed)                         0.800
>
> Total sample size (calculated)           1624
> Expected total number of events          509
>
> *************************
>
> -set tr on- and show us where the error occurs...
>
> HTH
> Martin
> _______________________
> ----- Original Message ----- From: "Michael McCulloch" <mm@pinest.org>
> To: "Statalist" <statalist@hsphsun2.harvard.edu>
> Sent: Friday, October 24, 2008 10:44 PM
> Subject: st: problem with -artsurv-
>
> > Hello,
> > I'm using the program -artsurv- which estimates sample size or 
> > power for survival data.
> > When I invoke the command, as follows, using syntax confirmed by 
> > the program's author:
> >
> > . artsurv, method(l) edf0(0.5) hr(1,0.75) np(3) lg(1 2) ldf(.1;.1) 
> > wg(1 2) wdf(.3;.1) recrt(2 0,1,0) distant(0) detail(0) onesided(0) 
> > ni(0) tunit(1)
> >
> > I get an error message:
> >
> > cesf not found
> > r(111);
> >
> > Could anyone shed some light on this?
> >
> > --
> >
> > Best wishes,
> > Michael McCulloch
> >
> >
> >
> > Pine Street Foundation
> > 124 Pine St., San Anselmo, CA 94960-2674
> > Tel: (415) 407-1357
> > Fax: (415) 485-1065
> > mcculloch@pinestreetfoundation.org
> > www.pinestreetfoundation.org
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>
>
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