Research-identifiable Medicare data can come from traditional fee-for-service Medicare claims or from Medicare Advantage claims. A new contribution to the Living Textbook of Pragmatic Clinical Trials published this month, Use of Medicare Data in PCTs, describes the important differences between these data.
At the healthcare system level, differences in incentives for documenting diagnoses can affect the reliability and relevance of data used for pragmatic clinical trials. The populations served by fee-for-service Medicare plans and Medicare Advantage plans are also disparate, as Medicare Advantage plans include a higher proportion of patients who require chronic disease management. There are also variations in enrollment rates across states and counties that reflect characteristics of the counties themselves (urban vs rural) and the firms that offer Medicare Advantage plans across regions.
For more on using Medicare data in pragmatic trials, see the following Living Textbook sections: