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st: short time-series analysis

From   "Thursky, Karin A" <[email protected]>
To   <[email protected]>
Subject   st: short time-series analysis
Date   Mon, 28 Mar 2005 23:33:19 +1000

I have a data on antibiotic usage per month (as grams) for 6 months before and 6 months after an intervention. The Cochrane group recommend repeated measures analysis, multiple t-tests and analysis of variance as accepted methodology for short time-series. (I assume that I have insuffucient data for an interrupted time series regression using ARIMA)
The data includes
- group (intervention/non-intervention)
- antibiotic in grams
- month
Can anyone suggest a stata methodology that is suitable for a short time-series analysis?

Karin Thursky
Infectious Diseases Physician
Royal Melbourne Hospital/Peter MacCallum Cancer Institute
[email protected]
0414 996649

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