COMPARATIVE STUDY
JOURNAL ARTICLE

[Persistence to treatment and resources use with inhaled fixed-dose combinations of corticosteroids and long-acting β-adrenergic agonists for the treatment of asthma: A population-based retrospective study]

A Sicras-Mainar, S Traseira-Lugilde, T Fernández-Sánchez, R Navarro-Artieda
Semergen 2018, 44 (7): 472-484
29545018

OBJECTIVE: To determine the persistence, exacerbations, and use of resources in patients who use inhaler treatment with fluticasone propionate/formoterol (PF/Form) in relation with other combinations of inhaled corticosteroid/long-acting β-adrenergic (ICS/LABA) at fixed doses, for the treatment of asthma in real-life practice.

MATERIAL AND METHODS: Observational study conducted by reviewing medical records. The study included subjects ≥18 years of age who started treatment with ICS/LABA and who met certain inclusion/exclusion criteria. The follow-up was carried out for one year. Study groups: a) PF/Form and b) Other-combinations (Other-ICS/LABA).

MAIN MEASUREMENTS: Persistence, medication possession ratio (MPR), exacerbations, and costs (direct/indirect). The statistical analysis was performed using regression models, with a P<.05.

RESULTS: A total of 3,203 patients were included in the study. By groups: a) FP/Form: 7.0% and b) Other-ICS/LABA: 93.0%. The mean age was 52.2 years, and 60.8% were women. A total of 44.9% of patients had persistent-moderate asthma. Patients under treatment with FP/Form were associated with greater persistence (67.6 vs. 61.2%, P=.043), a higher RPM (80.6 vs. 74.3%, P=.002), and less exacerbations (16.0 vs. 21.9%, P=.021), particularly severe-exacerbations (4.0 vs. 7.7%, P=.043). The mean/unit of the total cost (ANCOVA) was lower in patients under treatment with PF/Form (2,033 vs. € 2,486, P=.012), respectively. The total cost was associated with: Exacerbations (β=0.618), asthma-severity (β=0.214), age (β=0.073), and lack-adherence (RPM: β=-0.031), P<.01.

CONCLUSIONS: Patients undergoing treatment with PF/Form were associated with greater adherence to treatment (persistence, RPM), a circumstance that leads to less severe exacerbations and total costs for the national health system. These differences could be due to the pharmacological properties of the drug or other factors not measured.

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