Impact of Cost-Sharing Increases on Continuity of Specialty Drug Use: A Quasi-Experimental Study.

ABSTRACT:

Objective

To examine the impact of cost-sharing increases on continuity of specialty drug use in Medicare beneficiaries with multiple sclerosis (MS) or rheumatoid arthritis (RA).

Data sources/study setting

Five percent Medicare claims data (2007-2010).

Study design

Quasi-experimental study examining changes in specialty drug use among a group of Medicare Part D beneficiaries without low-income subsidies (non-LIS) as they transitioned from a 5 percent cost-sharing preperiod to a ≥25 percent cost-sharing postperiod, as compared to changes among a disease-matched contemporaneous control group of patients eligible for full low-income subsidies (LIS), who faced minor cost sharing (≤$6.30 copayment) in both the pre- and postperiods.

Data collection/extraction methods

SUBMITTER: Li P 

PROVIDER: S-EPMC6056595 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature