Accuracy of the days' supply and the number of refills allowed recorded in Quebec prescription claims databases for inhaled corticosteroids.

ABSTRACT:

Objectives and hypotheses

Adherence to inhaled corticosteroids (ICS) is a major issue in asthma. This study aimed to estimate the accuracy of the days' supply and number of refills allowed, variables recorded in Québec claims databases and used to estimate adherence, and to develop correction factors, if required. We hypothesised that the accuracy of the days' supply for ICS would be low whereas the accuracy of the number of refills allowed would be high.

Setting

40 community pharmacies in Québec (Canada) and a medication registry.

Participants

We collected data for 1108 ICS original prescriptions stored in the 40 pharmacies (sample 1), and we obtained a second sample of 2676 ICS prescriptions selected from reMed, a medication registry (sample 2).

Primary and secon

SUBMITTER: Blais L 

PROVIDER: S-EPMC4248090 | biostudies-literature | 2014 Nov

REPOSITORIES: biostudies-literature