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st: how to make xi dummies inherit labels


From   Roger Harbord <Roger.Harbord@bristol.ac.uk>
To   StataList <statalist@hsphsun2.harvard.edu>
Subject   st: how to make xi dummies inherit labels
Date   Wed, 02 Oct 2002 17:16:09 +0100

Is there a way to make the dummy variables created by -xi- inherit their variable labels from the value labels of the variable in question? It seems to me this would greatly improve the readability of the output of either
-outreg- or -reformat- after a regression command used with
-xi-.

Maybe I could write something to do this myself, but I can't believe someone hasn't done it before (but if so i've failed to findit).

Below is an illustration of what happens at present. I'd like e.g. the variable label of _Iage10yr2_2 to be "25-34" (the value label for 2) instead of "Age10yr2==2".

Hope that's clear..
Thanks,
Roger.

. label list age10yr2
age10yr2:
1 16-24
2 25-34
3 35-44
4 45-54
5 55-64
6 65-74

. xi: logistic siweekT2 i.age10yr2
i.age10yr2 _Iage10yr2_1-6 (naturally coded; _Iage10yr2_1 omitted)

Logit estimates Number of obs = 2406
LR chi2(5) = 1.02
Prob > chi2 = 0.9609
Log likelihood = -283.87549 Pseudo R2 = 0.0018

----------------------------------------------------------------------------
siweekT2 | Odds Ratio Std. Err. z P>|z| [95% Conf. Interval]
-------------+-------------------------------------------------------------
---
_Iage10yr2_2 | 1.241561 .7320912 0.37 0.714 .3908894 3.943504
_Iage10yr2_3 | 1.35575 .7829916 0.53 0.598 .4371014 4.20511
_Iage10yr2_4 | 1.550725 .8883524 0.77 0.444 .5045602 4.766025
_Iage10yr2_5 | 1.461749 .8738824 0.64 0.525 .4528932 4.717909
_Iage10yr2_6 | 1.632203 .9917213 0.81 0.420 .4961204 5.369842
---------------------------------------------------------------------------
---

. describe _I*

storage display value
variable name type format label variable label
---------------------------------------------------------------------------
----
_Iage10yr2_2 byte %8.0g age10yr2==2
_Iage10yr2_3 byte %8.0g age10yr2==3
_Iage10yr2_4 byte %8.0g age10yr2==4
_Iage10yr2_5 byte %8.0g age10yr2==5
_Iage10yr2_6 byte %8.0g age10yr2==6

. reformat, eform

LOGISTIC formatted output

Outcome variable: siweekT2 (Suicidal in week before T2), n=2406
----------------------------------------------------------------------------
Covariate Odds Ratio Std. Err. P>|z| (95% Conf. Interval)
----------------------------------------------------------------------------
Age10yr2==2
per unit 1.242 0.732 0.714 (0.391 to 3.944)
Age10yr2==3
per unit 1.356 0.783 0.598 (0.437 to 4.205)
Age10yr2==4
per unit 1.551 0.888 0.444 (0.505 to 4.766)
Age10yr2==5
per unit 1.462 0.874 0.525 (0.453 to 4.718)
Age10yr2==6
per unit 1.632 0.992 0.420 (0.496 to 5.370)
----------------------------------------------------------------------------

. outreg using test.out

. type test.out
Suicidal in week before T2
age10yr2==2 1.242
(0.37)
age10yr2==3 1.356
(0.53)
age10yr2==4 1.551
(0.77)
age10yr2==5 1.462
(0.64)
age10yr2==6 1.632
(0.81)
Observations 2406
Absolute value of z statistics in parentheses
* significant at 5%; ** significant at 1%


----------------------------------------------------
Roger Harbord mailto:roger.harbord@bristol.ac.uk
Department of Social Medicine, University of Bristol


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