Effect of Air Cleaner on the Indoor Allergen Sensitized Allergic Rhinitis Patients

February 12, 2018 updated by: Yonsei University

This study aimed to assess the impact of air cleanser on allergic rhinitis patients and indoor air quality. Air cleaners will be installed in the bedrooms and living rooms of the mite allergic rhinitis patients who aged 18-60 years.

Main parameters:

- Symptom medication score of allergic rhinitis

Supportive parameters:

  • Visual analog scale of allergic rhinitis
  • Quality of life score of allergic rhinitis
  • Indoor air quality measurement
  • Indoor allergen level measurement

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

The most important principle in the treatment of allergic diseases is to avoid or reduce exposure to the causative antigen. Causative agents that induce allergic diseases or exacerbate symptoms are classified into indoor and outdoor allergens. House dust mites and pet's hair are typical indoor antigens. Air pollution as well as allergens are important deterioration factors, and environmental management is essential for alleviating symptoms of allergic diseases. Therefore, we are about to evaluate the impact of the air cleaner to the allergic rhinitis patients.

A total of 45 patients will be enrolled in the study and a real air cleaner and a mock-up air cleaner will be randomly installed at ratio of 1: 1 to measure rhinitis symptoms and the changes in indoor air quality after 6 weeks of operation.

Study Type

Interventional

Enrollment (Actual)

44

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Korea, Republic of
      • Seoul, Korea, Republic of, 03722
        • Division of Allergy and Immunology Department of Internal Medicine, Yonsei University College of Medicine

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

19 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Adults between 19 and 65 years of age
  • Allergy specialist diagnosis of Moderate to severe persistent allergic rhinitis
  • Retrospective Rhinoconjunctivitis total symptom score higher than 7
  • Allergy against house dust mite: Skin prick test, with a more than 3 mm wheal, Serum specific IgE higher than 0.35 kUA/L measured by ImmunoCAP
  • Who can read and write Korean
  • Participants those who voluntarily agreed to this study

Exclusion Criteria:

  • Allergy against seasonal allergens (tree, grass, weed pollens)
  • Patients with rhinitis due to other causes (drug induced rhinitis or infectious rhinitis etc.)
  • Patients with severe anatomical abnormality that may cause nasal blockage such as nasal septum deviation or nasal polyps
  • Chronic systemic corticosteroids (≥ 3 months continuous use in past 12 months)
  • Participants planning to move or change residence within the study period.
  • Staying away from the home continuously for more than 5 days in the study period.
  • Having air cleaner previously
  • Having indoor smoker
  • If pregnancy test is positive or pregnancy is possible during study period.
  • Any other reason the participants is deemed unsuitable for participation in clinical trials

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Aircleaner group
PuriCare (HEPA Air Cleaner) in active mode
Device: PuriCare (HEPA Air Cleaner)
The active comparator group is a group that uses machines that have the same functions as those on the market. In intervention group, two air-cleaners will be activated, one in the living room (covers 91 m2) and the other in the bedroom (covers 58 m2). The air cleaner will be operated continuously for 6 weeks. Inside the air cleaner, a device for measuring the quality of the indoor air is built in. It will be used to compare indoor air quality before and after air cleaner operation. In order to maintain the double-blind setting, a label for 'prohibition of opening' will be attached to the joint of the outer case, and a sticker to cover the air quality measurement display part built in the air cleaner itself will be attached.
Placebo Comparator: Control comparator
Mock device of PuriCare in active mode
Device: Mock device of PuriCare
The Control group operates the air-cleaner with the same appearance as the experiment group. However, all the filters including HEPA filter will not be inserted in this group (mockup devices). Two mockup air-cleaners will be activated, one in the living room (covers 91 m2) and the other in the bedroom (covers 58 m2). The mockup devices will be operated continuously for 6 weeks. Same as active comparator group, a device for measuring the quality of the indoor air is built in the mockup air cleaner. It will be used to compare indoor air quality before and after air cleaner operation. In order to maintain the double-blind setting, a label for 'prohibition of opening' will be attached to the joint of the outer case, and a sticker to cover the air quality measurement display part built in the air cleaner itself will be attached.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Daily symptom score of allergic rhinitis
Time Frame: 6 weeks

Daily symptom score of allergic rhinitis:

  • Rhinorrhea
  • Nasal itchiness
  • Sneezing
  • Obstruction
6 weeks
Daily medication score of allergic rhinitis
Time Frame: 6 weeks

Daily medication score of allergic rhinitis - Intranasal steroid

  • Anti-histamine
  • Leukotriene modifier
6 weeks

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Visual analog scale of allergic rhinitis
Time Frame: 6 weeks
0 to 10 score of VAS
6 weeks
Quality of life score of allergic rhinitis
Time Frame: 6 weeks
questionnaire
6 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Yonsei University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

August 16, 2017

Primary Completion (Actual)

December 22, 2017

Study Completion (Actual)

December 22, 2017

Study Registration Dates

First Submitted

September 29, 2017

First Submitted That Met QC Criteria

October 12, 2017

First Posted (Actual)

October 18, 2017

Study Record Updates

Last Update Posted (Actual)

February 13, 2018

Last Update Submitted That Met QC Criteria

February 12, 2018

Last Verified

February 1, 2018

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 4-2017-0588

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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