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  • Title: Health literacy and type of education intervention predicting post-education metered-dose inhaler misuse.
    Author: Trela KC, Zajac P, Zhu M, Press VG.
    Journal: Respir Med; 2022; 200():106930. PubMed ID: 35870435.
    Abstract:
    BACKGROUND: Asthma and chronic obstructive pulmonary disease (COPD) guidelines recommend self-management assessment and inhaler education at all care-visits. Assessment is vital for identifying inhaler misuse. Whether age-related factors impede the efficacy of educational interventions for inhaler technique among older patients is unknown. We aimed to study factors associated with metered-dose inhaler (MDI) misuse pre/post-inhaler education among younger (< 65) and older inpatient populations (≥ 65). METHODS: Adult inpatients with asthma or COPD enrolled across five studies between 2007 and 2017, who were eligible for, consented, and assigned to one of three education interventions (Brief Intervention [BI], Teach-to-Goal [TTG], Virtual Teach-to-Goal [V-TTG]) were included. Participants' visual acuity, health literacy, and MDI technique pre/post education were assessed using validated assessments. Binary logistic regression was used to investigate factors that increased odds of inhaler misuse. RESULTS: Across the five studies, 394 unique participants were enrolled with a mean age of 51.9 years (SD±15). There was no significant difference in baseline MDI misuse by age, vision, or health literacy levels. Post-education misuse use was lower among patients with better baseline MDI technique, those who received TTG or V-TTG education, and those with high health literacy. Neither age nor visual acuity were significantly associated with increased rates of misuse, although age was correlated with low health literacy. CONCLUSION: MDI education with teach-to-goal modalities is more effective than brief intervention; however, patients with low health literacy (disproportionately affecting older patients) may benefit less from these interventions. Further investigation into tailored inhaler education is needed.
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