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st: creating an array with hospitalization days


From   "Maria Montez" <montez@bu.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: creating an array with hospitalization days
Date   Tue, 8 Nov 2005 14:56:48 -0500

Hi! I'm still on v8.

I'm looking at one year of data for which one record corresponds to one
hospitalization. I created variables day1-day365 to represent all the days
in that year. Now, I would like those variables to be equal to one during an
hospitalization. I have the admission day (admitday) and the discharge day
(disday) and using these, I created two variables begin and end that tell me
when did that hospitalization started and ended. Then I though that I could
loop from begin to end and change the day array from 0 to 1. However I'm
getting a syntax error and I think it comes from the begin and end variables
in the forvalues loop. Can anyone help me?

sample code:

forvalues i=1(1)365 {
 	gen day`i'=0
}

gen begin=admitday-mdy(10,1,2000)+1
replace begin=1 if begin<=0

gen end=disday-mdy(10,1,2000)+1

forvalues i=begin(1)end {
	replace day`i'=1
}

sample data:

      +--------------------------------------------------------------+
       | study_id    admitday      disday   begin   end   day1   day2 |
       |--------------------------------------------------------------|
    1. |       19   03jan2001   24jan2001      95   116      0      0 |
    2. |      362   24may2001   29may2001     236   241      0      0 |
    3. |      396   01jun2001   07jun2001     244   250      0      0 |
    4. |      436   21mar2001   22mar2001     172   173      0      0 |
    5. |      438   17jan2001   25jan2001     109   117      0      0 |
       |--------------------------------------------------------------|
    6. |      517   06mar2001   21mar2001     157   172      0      0 |
    7. |      517   11sep2001   17sep2001     346   352      0      0 |
    8. |      590   16sep2001   17sep2001     351   352      0      0 |
    9. |      879   20dec2000   22dec2000      81    83      0      0 |
       +--------------------------------------------------------------+

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