Re: st: Help with multiple imputation using Stata

["Jon Heron (ALSPAC)" <Jon.Heron@bristol.ac.uk>]

Are you using the latest copy of ice?

I believe Patrick Royston has been working on the problem
of perfect prediction - adding fake cases to the dataset to guard
against this problem.  Perhaps this hasn't been implemented yet.


Jon


--On 21 November 2007 07:14 +0000 Maarten buis <maartenbuis@yahoo.co.uk> 
wrote:


> So that was the problem -ice- ran into, and now you know something
> more: the variable numnp10y2 is the offending variable. See if the
> logit works when you remove that variable, and if that is the case,
> rerun -ice- but remove numnp10y2 from the e10y_np equation using the
> -eq()- option.
>
> --Maarten
>
> --- Adriana Pinho <adrianaapinho@gmail.com> wrote:
>
> > Hi Maarten,
> > Thanks for your advice but the following error message came out:
> >
> > logit e10y_np numcp10y3 numnp10y2 elife_lp cp10y1 cp10y2 male6m1
> > male6m2 malever1 malever2
> >
> > "outcome = numnp10y2 > 0 predicts data perfectly
> > r(2000)"
> >
> > Would you know to what next step I should move on?
> >
> > Thanks in advance for your help
> > Regards,
> > Adriana
> >
> >
> >
> > On Nov 17, 2007 9:05 AM, Maarten buis <maartenbuis@yahoo.co.uk>
> > wrote:
> > > --- Adriana Pinho <adrianaapinho@gmail.com> wrote:
> > > > "Error running -uvis- I detected a problem with running uvis with
> > > > command logit on response e10y_np
> > > > and covariates numcp10y3 numnp10y2 elife_lp cp10y1 cp10y2 male6m1
> > > > male6m2 malever1 malever2 r(198)"
> > >
> > > Try running:
> > >
> > > logit e10y_np numcp10y3 numnp10y2 elife_lp cp10y1 cp10y2 /*
> > > */ male6m1 male6m2 malever1 malever2
> > >
> > > and see if that gives you any trouble
> > >
> > > -- Maarten
> > >
> > > -----------------------------------------
> > > Maarten L. Buis
> > > Department of Social Research Methodology
> > > Vrije Universiteit Amsterdam
> > > Boelelaan 1081
> > > 1081 HV Amsterdam
> > > The Netherlands
> > >
> > > visiting address:
> > > Buitenveldertselaan 3 (Metropolitan), room Z434
> > >
> > > +31 20 5986715
> > >
> > > http://home.fsw.vu.nl/m.buis/
> > > -----------------------------------------
> > >
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> -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology
> Vrije Universiteit Amsterdam
> Boelelaan 1081
> 1081 HV Amsterdam
> The Netherlands
>
> visiting address:
> Buitenveldertselaan 3 (Metropolitan), room Z434
>
> +31 20 5986715
>
> http://home.fsw.vu.nl/m.buis/
> -----------------------------------------
>
>
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--------------------------------------------------
Dr Jon Heron
Statistics Team Leader
ALSPAC, Dept of Social Medicine
24 Tyndall Avenue
Bristol BS8 1TQ
Tel: 0117 3311616
Fax: 0117 3311704
*
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