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This approach allows evaluators to compare individual or organizational data collected after an intervention to data collected before the intervention. In the diagram, Observation 1 measures the outcome before intervention, followed by the intervention (value-based purchasing activity), followed by Observation 2, which measures the outcome after the intervention.
Internet Citation: Evaluating the Impact of Value-Based Purchasing: Figure 3. Pretest/Posttest (or Before/After) Design (text description).
May 2002. Agency for Healthcare Research and Quality, Rockville, MD. http://archive.ahrq.gov/professionals/quality-patient-safety/quality-resources/value/valuebased/fig3desc.html
The information on this page is archived and provided for reference purposes only.