Thanks for your response.
Do you mean that both the log-odds and odd ratio have the same meaning?
My question is that the log-odd estimate 0.3618 is it for group1 or group2?
normally 1vs2, glm takes 2 as reference, in the group1 the IQ increase
by 0.3618compared to group 2
What does the odd ratio 1.43359 is interpreted?
in the group1 the IQ score increase by 1.43359 compared to group 2
On Mon, Jan 25, 2010 at 10:05 AM, Mohamed Lajnef
<mohamed.laj...@inserm.fr> wrote:
> Hi val,
>
>
> Val a écrit :
>>
>> Hi all
>>
>> Assume I have a data set xx;
>>
>> Group: 1=group1 , 2=group2
>>
>> IQ: 1= High, 0 =low
>>
>> fit <- glm(IQ ~group, data = xx, family = binomial())
>>
>> summary(fit)
>>
>> Results
>>
>> Estimate Std. Error z value Pr(>|z|)
>>
>> (Intercept) -2.55456 0.210 -12.273 < 5e-16 ***
>>
>> group 0.36180 0.076 3.952 5.24e-05 ***
>>
>> the odd ratio = exp(0.36180 )= 1.435912
>>
>> My question is that the log-odd estimate 0.3618 is it for group1 or
>> group2?
>>
>
> normally 1vs2, glm takes 2 as reference, in the group1 the IQ increase by
> 0.3618compared to group 2
>
>> What does the odd ratio 1.43359 is interpreted?
>>
>
> in the group1 the IQ score increase by 1.43359 compared to group 2
>
>> Thanks in advance
>>
>
> Regards
> ML
>>
>> ______________________________________________
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>>
>
>
> --
> Mohamed Lajnef
> INSERM Unité 955. 40 rue de Mesly. 94000 Créteil.
> Courriel : mohamed.laj...@inserm.fr tel.: 01 49 81 31 31 (poste 18470)
> Sec : 01 49 81 32 90
> fax : 01 49 81 30 99 Portable:06 15 60 01 62
>
>
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
