ArticleJournal of asthma and allergy2023
Validation of Diagnostic Coding for Asthma in an Electronic Health Record System in Hong Kong.
Article in Journal of asthma and allergy, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
25 citing papers in PubMed, 21 citations in OpenAlex.
- A territory-wide study on adults hospitalized for rhinovirus infection - mortality, severe adverse respiratory and renal outcomes and relationships with multiple comorbidities.Journal of medical microbiology · 2026Article
- Comparing Pneumonia Risks of Budesonide with Fluticasone Among Patients with Asthma in Hong Kong: A Territory-Wide Retrospective Study.Advances in therapy · 2026Article
- Epidemiology, risk factors and clinical outcomes of multidrug-resistantJournal of thoracic disease · 2026Article
- Article
- Trends in Dementia Incidence, Prevalence, and Mortality among Older Hong Kong Chinese, 2005-2019: A Population-Based Study.Neuroepidemiology · 2026Article
- Cardiovascular-Kidney-Metabolic (CKM) Syndrome as Independent Risk Factor for Pneumococcal Pneumonia: Evidence from a Territory-Wide Study.Microorganisms · 2026Article
- Cardio-Renal Diseases Are Independent Risk Factors of Severe Human Metapneumovirus Infection Among Patients Without Chronic Airway Diseases.Journal of medical virology · 2026Article
- Glucagon-Like Peptide-1 Receptor Agonists vs Dipeptidyl Peptidase-4 Inhibitor Use on Risk of Asthma Exacerbation Among Diabetic Patients with Co-Morbid Asthma in Hong Kong.Journal of asthma and allergy · 2026Article
- Potential Impact of Biologic Use on Asthma-Related Hospitalization: An Epidemiological Study in Hong Kong.Canadian respiratory journal · 2026Article
- Agreement Between ICD-10 Code-Only and Composite Definitions of Asthma Exacerbations in Electronic Health Records: A Multicenter Cohort Study in Taiwan, 2017-2023.Clinical epidemiology · 2026Article
- Differences in Type 2 Phenotype and Clinical Characteristics of Adult Asthma Patients with Different Severity, Across GINA Step 1 to 5 Asthma.Journal of asthma and allergy · 2026Article
- Hospitalization Outcomes of Patients with Asthma, COPD, and Asthma-COPD Overlap Syndrome.Chronic obstructive pulmonary diseases (Miami, Fla.) · 2025Article
- Medical Comorbidities as the Independent Risk Factors of Severe Adenovirus Respiratory Tract Infection in Adults.Microorganisms · 2025Article
- Bisphosphonates and the risk of dementia in patients with osteoporosis or fragility fracture: A population-based study in Hong Kong.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025Article
- A decade of Benzodiazepine and Z-drug use in Hong Kong: a longitudinal study.The Lancet regional health. Western Pacific · 2025Article
- In-Hospital Mortality and Severe Respiratory and Renal Outcomes-A Territory-Wide Comparison Between RSV and Influenza.Influenza and other respiratory viruses · 2025Article
- The Indirect Impact of COVID-19 Pandemic on Mortality, Complications, and Healthcare Utilization Among Patients With Chronic Respiratory Diseases in Hong Kong: An Interrupted Time Series Analysis.Journal of evidence-based medicine · 2025Article
- Multimorbidity incidence following hospitalization for SARS-CoV-1 infection or influenza over two decades: a territory-wide retrospective cohort study.NPJ primary care respiratory medicine · 2025Article
- Prognostic Implication of Computational Angiography-Derived Fractional Flow Reserve in Patients With Nonobstructive Coronary Artery Disease.Journal of the American Heart Association · 2025Article
- Phenome-Wide Analysis of Coffee Intake on Health over 20 Years of Follow-Up Among Adults in Hong Kong Osteoporosis Study.Nutrients · 2024Article
Corrections and comments
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Authors and funding
5 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: Electronic health record (EHR) databases can facilitate epidemiology research into various diseases including asthma. Given the diagnostic challenges of asthma, the validity of the coding in EHR requires clarification. We aimed to assess the validity of International Classification of Diseases, 9th Revision (ICD-9) code algorithms for identifying asthma in the territory-wide electronic medical health record system of the Clinical Data Analysis and Reporting System (CDARS) in Hong Kong. Methods: Adult patients who had the diagnosis of asthma input from all public hospitals in Hong Kong and those from Queen Mary Hospital in 2011-2020 were identified using the ICD-9 code of 493 (493.0, 493.1, 493.2, and 493.9) by CDARS. Patients' clinical record and spirometry were reviewed by two respiratory specialists to confirm the presence of asthma in the randomly selected cases. Results: There were 43,454 patients who had the diagnostic code of asthma among all public hospitals in Hong Kong and 1852 in Queen Mary Hospital in the same period. A total of 200 cases were randomly selected and validated using medical record and spirometry review by a respiratory specialist. The overall positive predictive value (PPV) was 85.0% (95% CI 80.1-89.9%). Conclusion: This was the first ICD-9 code validation for CDARS (EHR) in Hong Kong on asthma. Our study demonstrated that using ICD-9 code (493.0, 493.1, 493.2 and 493.9) to identify asthma can result in a PPV that was reliable to support the utility of the CDARS database for further research on asthma among the Hong Kong population.
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Registered trials
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