From: The Paired Availability Design for Historical Controls
Requirement | Specific Criteria | |
---|---|---|
Stable population | 1. | Hospital serves one geographic area or |
 |  | is military medical center |
 | 2. | No in- or out- migration |
 | 3. | Eligibility criteria constant over time |
 | 4. | No underlying change in prognosis |
 |  | over time |
Stable treatment | 1. | Other patient management constant |
 |  | over time |
Stable evaluation | 1. | Evaluation criteria constant over time |
Stable preference | 1. | No publicized credible reports |
 | 2. | No direct-to-consumer advertising |
Effect of the intervention on outcome does | 1. | Effect of intervention does not depend |
not change with a change in availability | Â | on when the intervention was given |
(only applicable when some in "before" | Â | during the course of disease |
group receive intervention) | 2. | No learning curve for the intervention |