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st: RE: Calculating readmissions for specific providers

From   "Nick Cox" <>
To   <>
Subject   st: RE: Calculating readmissions for specific providers
Date   Wed, 25 Nov 2009 12:03:41 -0000

I am not sure I follow this. This isn't my field and I have no idea what
a provider is. (Other people may have the same issue.) But reissuing
-duplicates- with the -provider- variable too might help. That is, it
sounds as if you seek duplicates on both -mrn- and -provider-. 


Michelle Unterbrink

I'm calculating readmission rates for a hospital with many providers. I
have been able to successfully calculate overall readmission rates; but
I also need to calculate readmissions from a particular group of
physicians. In other words, I need to know interval between admissions
for patients that are discharged by a group of providers, then admitted
later to any provider.

My data is set up with rows corresponding to visits, and patients have
unique identifiers (mrn).

Interval between admissions:
bysort mrn (adm_date) : gen readmit_interval = (hours(adm_date -

Number of times a patient is admitted:
duplicates tag mrn, generate (readmissions)

The preceding commands generate statistics for all admissions,
regardless of provider.

I generated a new variable to identify the providers of interest:
For 'provider' variable, 1 = a provider of interest, 0 = other providers

gen provider = (md_name==1|md_name==5...)

Using the provider variable, it's simple to calculate readmissions for
patients discharged from and readmitted to the providers of interest,
but this doesn't capture readmissions to the other providers:
bysort mrn (adm_date) : gen readmit_interval_hosp = (hours(adm_date -
dsc_date[_n-1])/24) if provider==1

How can I modify my readmission formulas to capture readmissions only
when a patient is discharged from a provider of interest? Any help would
be much appreciated!

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