Beijing Indoor Air Purifier Intervention Study

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

35 participants

Study Classification

INTERVENTIONAL

Study Start Date

2013-12-31

Study Completion Date

2014-11-30

Brief Summary

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This study aimed to assess the impact of air filtration on indoor air quality and cardio-pulmonary health in residents living in high outdoor pollution settings in Beijing.

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Cardiovascular Outcomes

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Detailed Description

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Conditions

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Pulmonary Disease

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

HEALTH_SERVICES_RESEARCH

Blinding Strategy

DOUBLE

Participants Investigators

Study Groups

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Active-mode

Air purifier in active-mode

Group Type ACTIVE_COMPARATOR

air purifier

Intervention Type OTHER

filtration units randomly allocated to active- and sham-mode in 20 recruited households for four weeks

Sham-mode

Air purifier in sham-mode

Group Type SHAM_COMPARATOR

air purifier

Intervention Type OTHER

filtration units randomly allocated to active- and sham-mode in 20 recruited households for four weeks

Interventions

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air purifier

filtration units randomly allocated to active- and sham-mode in 20 recruited households for four weeks

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Global Initiative for Chronic Obstructive Lung Disease criteria (mild to moderate, GOLD stage I\~II;
* severe to very severe, GOLD stage III\~IV) quit smoking for at least 1 year;
* a ratio of pre-bronchodilator forced expiratory volume in one second (FEV1) to forced vital capacity (FVC) equal to or less than 0.70 and an increase of FEV1 with the use of 400μg of albuterol of less than 12% of the pre-bronchodilator one;
* no history of asthma or any other active lung disease.
* Subjects were free from exacerbations for at least 6 weeks.

Exclusion Criteria

* Patients with heart pacemaker,
* heart failure with bundle-branch block,
* recent myocardial infarction (in the last 12 weeks) and
* anticoagulant therapy

Minimum Eligible Age

40 Years

Maximum Eligible Age

80 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes