Abstract
ABSTRACTObjective: The impact of diagnostic work-up in asthma management on medication redemption and probably also drug adherence is largely unknown, but we hypothesized that a confirmed diagnosis of asthma in a hospital-based out-patient clinic increases the willingness to subsequent medication redemption in a real life setting. Methods: In a retrospective register-based study, 300 medical records of patients referred with possible asthma during one year were examined, of whom 171 had asthma (57%). One-year data on dispensed medicine was collected using the Danish Registry of Medicinal Product Statistics. Patients who had a positive asthma (e.g. bronchial challenge) were classified as verified asthma, whereas unverified asthma refers to doctor's diagnosis of asthma with negative or no diagnostic tests performed. Results: 111 (65%) had a verified diagnosis and patients with verified asthma were more frequently prescribed new therapy compared to those with unverified asthma (88.9% vs. 65.0%, respectively, p < 0.001). No difference was found in first time redemption of prescriptions (72% vs. 64%, respectively, p = 0.3), whereas the second (52% vs. 27%, p = 0.001) and third or more asthma redeemed prescriptions (37% vs. 17%, p = 0.006) showed increased redemption of prescription and probably adherence in the verified compared with the unverified patients with asthma. Furthermore, the use of inhaled corticosteroid (ICS) was calculated as Percent Days Covered (PDC), which was higher in the verified group compared with the non-verified asthma group (88% vs. 30%, p = 0.004). Conclusion: Objective verification of a diagnosis of asthma using asthma tests was associated with an improved redemption of prescription.
Published Version
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