Trial reportYonsei medical journal2020
Effects of Air Purifiers on Patients with Allergic Rhinitis: a Multicenter, Randomized, Double-Blind, and Placebo-Controlled Study.
Trial report in Yonsei medical journal, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
17 citing papers in PubMed, 39 citations in OpenAlex.
- Trial
- Health Benefits of Air Purification: A Systematic Review.Environment & health (Washington, D.C.) · 2026Review
- Article
- Targeting Pollutants in the Treatment and Prevention of Atopic Dermatitis.Immunology and allergy clinics of North America · 2025Review
- Chinese Expert Consensus on the Impact of Ambient Air Pollution on Allergic Rhinitis and Recommendations for Mitigation Strategies.Allergy, asthma & immunology research · 2025Review
- Individual wearable air purifier protects against pollen, house dust mite, and cat allergens: Report from an allergen exposure chamber.Allergologie select · 2024Article
- Risk factors of allergic rhinitis and its prevention strategies.Frontiers in allergy · 2024Review
- Causal association between air pollution and allergic rhinitis, asthma: a Mendelian randomization study.Frontiers in public health · 2024Article
- Distributional Characteristics Analysis of Allergens in Patients with Allergic Rhinitis in Southern Fujian Province, China.Journal of asthma and allergy · 2024Article
- Bronchial Asthma, Airway Remodeling and Lung Fibrosis as Successive Steps of One Process.International journal of molecular sciences · 2023Review
- KAAACI Guidelines for Allergen Immunotherapy.Allergy, asthma & immunology research · 2023Review
- KAAACI Allergic Rhinitis Guidelines: Part 2. Update in Non-pharmacological Management.Allergy, asthma & immunology research · 2023Review
- Investigating the microbiome of house dust mites in South Korea.Frontiers in allergy · 2023Review
- Indoor Air Purification and Residents' Self-Rated Health: Evidence from the China Health and Nutrition Survey.International journal of environmental research and public health · 2022Article
- Effect of air filtration on house dust mite, cat and dog allergens and particulate matter in homes.Clinical and translational allergy · 2022Article
- Nonpharmacological measures to prevent allergic symptoms in pollen allergy: A critical review.Allergologie select · 2021Review
- Effectiveness of Personal-Level Protective Measures Against Air Pollution on Respiratory Health: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.Indian journal of occupational and environmental medicineArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
11 authors at 3 institutions in 2 countries.
Funding
Abstract
purposeExposure to particulate matter (PM) is a well-known risk factor in the triggering and exacerbation of allergic airway disease. Indoor environments, where people spend most of their time, are of utmost importance. To assess the effects of air purifiers [equipped with high-efficiency particulate air (HEPA) filters] on allergic rhinitis (AR) in adult patients, we performed a multicenter, randomized, double-blind, and placebo-controlled study. MATERIALS AND
methodsPatients with house dust mite (HDM)-induced AR were randomly assigned to either active or mockup (placebo) air-purification groups. Two air purifiers (placed in living room and bedroom) were operated for 6 weeks in each home environment. The primary study endpoint was to achieve improvement in AR symptoms and medication scores. Secondary endpoints were to achieve improvement in the quality of life (QoL) and visual analog scale (VAS) scores, as well as in the indoor (bedroom and living room) concentrations of PM
resultsAfter 6 weeks of air purifier use, medication scores improved significantly in the active (vs. placebo) group, although subjective measures (symptoms, VAS, and QoL scores) did not differ. Bedroom PM
conclusionThe use of air purifiers with HEPA filters significantly reduced medication requirements for patients with HDM-induced AR and significantly lowered indoor PM
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.