2021년 Vol.38 No.02
Background : Inhaler use is the first-line therapy for asthma and chronic obstructive pulmonary disease (COPD), and the proper way to use an inhaler is an important factor for clinical outcomes. Although previous studies have already proved the improvement of the inhaler technique (IT) and disease control through education, few studies have proved the correlation between these two factors. In this study, we aim to unravel the clinical effect of the IT education using an assessment tool, through observation of IT and disease control and analysis of the correlation between the two factors.
Methods : A retrospective, pre-post cohort analysis was performed in patients who were prescribed inhalers for asthma and COPD from June 1 to August 31, 2020 and who received 2 or more education sessions about their inhalers from pharmacists. The IT was measured using assessment tools for each type of inhaler device before the 1st education session, after the 1st education session, and before the 2nd education session. For the evaluation of disease control, self-assessment tools, such as asthma control test (ACT) and COPD assessment test (CAT), were used. We observed the changes in the IT score and ACT or CAT score. We also analyzed the correlation between ACT or CAT score change and IT score.
Results : A total of 26 asthma and 31 COPD patients completed 31 and 36 2nd education sessions, respectively. There was a negative correlation between the CAT score change and IT score (r=-0.439, p=0.007). In all patients, the IT score was significantly increased to 66.9±31.6 directly after the 1st education session (p<0.001), and maintained until 2nd education (p=0.097). The CAT score was decreased 3.03±7.00 (p=0.014), and ACT score was increased to 1.68±4.48 (p=0.046) with significance.
Conclusion : There is a correlation between IT and disease control in COPD, which means solely education about IT can improve the quality of life and pulmonary function of COPD patients. A similar trend was found in asthma, but further research with quality scale is needed to prove the correlation.