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Study on the Prevalence of Non-respiratory Comorbidities in Asthma Patients: A Nationwide Cohort Study
Korean J Clin Pharm 2024;34(3):194-201
Published online September 30, 2024
© 2024 Korean College of Clinical Pharmacy.

Su-Jin Kang1 and Kiyon Rhew1*

1College of Pharmacy, Dongduk Women’s University, Seoul 02748, Republic of Korea
Correspondence to: Kiyon Rhew, College of Pharmacy, Dongduk Women’s University, Hwarangro-13gil 60 Seongbuk-gu, Seoul, 02748, Republic of Korea
Tel: +82-2-940-4519, Fax: +82-2-940-4195, E-mail: kiyon@dongduk.ac.kr
Received August 23, 2024; Revised September 11, 2024; Accepted September 13, 2024.
This is an Open Access journal distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Background: Asthma is a chronic inflammatory airway disease associated with systemic inflammation and increased prevalence of various comorbid conditions. This study investigates the prevalence of non-respiratory comorbidities among adult asthma patients in South Korea, aiming to elucidate potential correlations and impacts of asthma on overall health, thereby affecting patients’ quality of life and healthcare systems. Methods: This retrospective cohort study utilized the National Health Insurance Service data (HIRA-NPS-2020) and included adults diagnosed with asthma. Non-respiratory diseases were identified using the Korean Standard Disease Classification (KCD-8) codes, with exclusions applied for other respiratory conditions. The prevalence of comorbidities was analyzed and compared between asthma and non-asthma patients, adjusting for confounders such as age, gender, and insurance status through inverse probability treatment weighting (IPTW). Results: The analysis revealed that asthma patients exhibit significantly higher rates of cardiovascular diseases, metabolic disorders, gastrointestinal conditions, and mental health issues compared to the control group. Notably, conditions such as heart failure, gastroesophageal reflux disease, and anxiety were more prevalent, with odds ratios (OR) ranging from 1.18 to 3.90. These results demonstrate a substantial burden of comorbidities associated with asthma, indicating a broad impact on health beyond the respiratory system. Conclusion: The findings highlight the systemic nature of asthma and the interconnectedness of inflammatory processes across different organ systems. This comprehensive analysis confirms previous research linking asthma with an increased risk of various non-respiratory diseases, providing insights into the multifaceted impact of asthma on patient health.
Keywords : Asthma, inflammation, non-respiratory comorbidity, prevalence


September 2024, 34 (3)
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