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Investigation of the Effect of Air Purifiers with TPA Filters on Allergy Symptoms

Empirical study on the effect of environmental conditioning using air purifiers with TPA filters on allergy symptoms

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT1032230681
Enrollment
50
Registered
2024-03-06
Start date
2024-03-06
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

cedar pollen allergy

Interventions

Have the research subjects use air dogs as part of their indoor environment. (Used mainly in the bedroom)

Sponsors

Yoshikawa Sumiyo
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Persons who meet all of the following criteria will be considered for this study (1) Age between 25 and 50 years old at the time of application for participation in this study. 2) Have a positive blood test result for cedar antigens and symptoms such as sneezing, runny nose, or stuffy nose during the cedar pollen dispersal period, and have been diagnosed with cedar pollen at the time of application for participation in this study. 3) Those who are not currently receiving sublingual therapy but only drug therapy at the time of application to participate in this study. 4) Persons who have given their consent to participate in this study of their own free will and who have consented to the use of Airdog.

Exclusion criteria

Exclusion criteria: Persons who violate any of the following criteria will not be included in this study 1) Those who are hospitalized at the time of application for participation in this study 2) Those who are already in possession of an Airdog

Design outcomes

Primary

MeasureTime frame
The primary endpoint will be the percentage of subjects who show improvement in nasal and ocular symptoms and quality of life scores (those who select "mild" or "somewhat mild") compared to symptoms in previous years, which will be obtained from questionnaires (based on the JRQLQ) collected every two weeks from the start of Airdog use.

Secondary

MeasureTime frame
The following items, which can be confirmed from the questionnaire results, will be considered as secondary evaluation items. Current outcomes related to labor productivity (work/study time loss rate, work/study failure rate, overall work/study failure rate, and daily activity failure rate) Percentage improvement in current outcomes relative to labor productivity outcomes in previous years Percentage of improvement in current year symptoms for each patient group with different levels of current symptoms. Correlation between AQI values (a function of the airdog quantification) and current symptom scores

Contacts

Public ContactKeita Ueda

toConnect,inc.

tcn-info@toconnect.co.jp+81-50-5830-8935

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026