This information is for reference purposes only. It was current when produced and may now be outdated. Archive material is no longer maintained, and some links may not work. Persons with disabilities having difficulty accessing this information should contact us at: https://info.ahrq.gov. Let us know the nature of the problem, the Web address of what you want, and your contact information.
Figure 5. Nonequivalent Comparison Group (Text Description)
Using this approach, analysts make preintervention and postintervention observations for both the intervention group and the comparison group that does not receive the intervention. Before the intervention, outcomes for the intervention group (Observation 1a) and for the comparison group (Observation 1b) are measured. After the intervention, outcomes for the intervention group (Observation 2a) and for the comparison group (Observation 2b) are measured.
Internet Citation: Evaluating the Impact of Value-Based Purchasing: Figure 5. quivalent Comparison Group (text description).
May 2002. Agency for Healthcare Research and Quality, Rockville, MD. http://archive.ahrq.gov/professionals/quality-patient-safety/quality-resources/value/valuebased/fig5desc.html
The information on this page is archived and provided for reference purposes only.