Re: st: Re: another aflogit issue

[Richard Williams <Richard.A.Williams.5@ND.edu>]

At 04:07 PM 10/31/2006, Marc Campo wrote:
> Here is what I am doing:
>
> .logistic incident_lowback age gender hours_week
> second_job job_strain
>
> aflogit job_strain
>
> The regression runs fine but no AF!!
>
> I have also tried this one:
>
> .logistic incident_wrist age gender hours_week
> second_job xfer position manual_total
>
> .aflogit manual_total, ref(manual_total=3)
Mark, try renaming the vars so they are only 8 characters long:

. webuse auto, clear
(1978 Automobile Data)

. quietly logistic  foreign mpg   length displacement

. aflogit displacement

Population attributable fraction from logistic regression
Cross-sectional / cohort data (n=74)


Term      Ref.     A.F.        s.e.      [95% Conf. Int.]*
----------------------------------------------------------
ment not found
r(111);

. clonevar displace = displacement

. quietly logistic  foreign mpg   length  displace

. aflogit  displace

Population attributable fraction from logistic regression
Cross-sectional / cohort data (n=74)


Term      Ref.     A.F.        s.e.      [95% Conf. Int.]*
----------------------------------------------------------
displace   0     -2.3631           .           .        .
----------------------------------------------------------
TOTAL            -2.3631           .           .        .

* CI calculated on log(1-AF) scale

I haven't worked my way through the code, but it is an old program, 
and it looks like long variable names cause it grief.


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Richard Williams, Notre Dame Dept of Sociology
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