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Re: st: hosmer lemshow goodness of fit statistics


From   "Yusvita Triwiadhian S." <07.5544@stis.ac.id>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: hosmer lemshow goodness of fit statistics
Date   Thu, 9 Jun 2011 08:11:50 +0700

oh sorry, i'm forget. thank you for the correct.

On Thu, Jun 9, 2011 at 5:31 AM, Ari Samaranayaka
<ari.samaranayaka@ipru.otago.ac.nz> wrote:
> As Steve says small Pvalues indicate lack of fit. Reference for HL goodness
> fit test is Hosmer Jr., D. W., Lemeshow. S. 2000. Applied Logistic
> Regression. 2nd ed. New York: Wiley. According to my experience this test is
> very unreliable because Pvalue is very sensitive to the groupings. In other
> words you decide the Pvalue. This fact is acknowledged by the  Hosmer and
> Lemeshow in a different publication. However this test is still widely used
> for logistic regression (I would say almost the standard) at least within
> the discipline of epidemiology. I like others Stata users' comments on this
> test although this is not specifically about Stata.
> Ari
>
>
>
> On 9/06/2011 9:20 a.m., Steven Samuels wrote:
>>
>> No, just the reverse: small p-values indicate lack of fit.  But Ann is
>> asking for guidance on cut-points, and I know of none.
>>
>> Steve
>>
>>
>>
>>
>> On Jun 8, 2011, at 6:34 AM, Yusvita Triwiadhian S. wrote:
>>
>> Hi Ann
>>
>> as i know,it depends on your alpha that you are using. if significancy
>> <  alpha, it means the model fits the data well.
>>
>> On Wed, Jun 1, 2011 at 2:00 AM, Fitzmaurice, Ann E.
>> <a.e.fitzmaurice@abdn.ac.uk>  wrote:
>>>
>>> Good evening
>>>
>>> I have run a series of logistic regressions and obtained the HL GOF
>>> statistic, I have read in articles that "the HL GOF fits the data well" or
>>> that "the HL GOF statistic fits the data adequately"
>>>
>>> Does anyone know if there are cut points for the definition of good fit,
>>>  or adequate fit and if so what is the reference (s)
>>>
>>
>> *
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>
>
> --
> Dr. Ari Samaranayaka
> IPRU, Dept of Preventive and Social Medicine
> University of Otago
>
> Find out about the 11th World Conference on Injury Prevention and Safety
> Promotion by visiting www.safety2012.org.nz
>
> *
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>

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