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st: Using the "collapse" command to generate median and range

From   Sarah Sorscher <[email protected]>
To   "[email protected]" <[email protected]>
Subject   st: Using the "collapse" command to generate median and range
Date   Thu, 15 Nov 2012 11:30:36 -0600

Dear list,

I am using the "collapse" command to generate summary statistics for my data. The following code gives me median, mean, standard deviation, and number (n) for my variable, *duration*, aggregated by *treatment* and *sickestpt*.

. collapse (p50) mediandur=duration (mean) meandur= duration (sd) sddur=duration (count) n=duration, by(treatment sickestpt)

But I can't figure out how to generate a range.

I haven't been able to find range in the Summary Statistics section of the STATA help manual, and searches churn up too many unrelated uses of the term "range."

I considered adding the following: 
(p99) hirangedur=duration (p1) lorangedur=duration

But this would only get me the 99th and 1st percentile, as opposed to range. 

Is there any term I could use to collapse for range?


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