CompletedNot Applicable

Influence of Indoor Air Filtration Strategies on Occupant Health Indicators

China89 participantsStarted 2014-11

Plain-language summary

The purpose of this study is to evaluate whether two different central air purification technologies reduce air pollutant exposure and beneficially influence health as evaluated with a suite of biological markers related to cardiovascular and respiratory disease risk.

Who can participate

Age range

18 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * Healthy adults; * Live and work at the Broad Town work campus in eastern Changsha, Hunan Province, China Exclusion Criteria: * Has any of the following diseases: chronic respiratory, cardiovascular, liver, renal, hematological disease; diabetes mellitus; * Has any other diseases that may confound or complicate the effects of the intervention * Pregnant females

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Change from baseline FEV1

Timeframe: At baseline, 2 weeks and 4 weeks into the intervention period, and then 2 weeks post-intervention

Change from baseline soluble P-selectin

Timeframe: At baseline, 2 weeks and 4 weeks into the intervention period, and then 2 weeks post-intervention

Change from baseline von Willebrand factor (VWF)

Timeframe: At baseline, 2 weeks and 4 weeks into the intervention period, and then 2 weeks post-intervention

Change from baseline augmentation index (AI)

Timeframe: At baseline, 2 weeks and 4 weeks into the intervention period, and then 2 weeks post-intervention

Change from baseline systolic blood pressure (SBP)

Timeframe: At baseline, 2 weeks and 4 weeks into the intervention period, and then 2 weeks post-intervention

Change from baseline fractional exhaled nitric oxide (FeNO)

Timeframe: At baseline, 2 weeks and 4 weeks into the intervention period, and then 2 weeks post-intervention

Trial details

NCT IDNCT02769208

SponsorFeng Li

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2015-01

View on ClinicalTrials.gov More Risk Factors for Respiratory and Cardiovascular Disease trials

Who can participate

Age range

18 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

What they're measuring

Change from baseline FEV1

Timeframe: At baseline, 2 weeks and 4 weeks into the intervention period, and then 2 weeks post-intervention

Change from baseline soluble P-selectin

Timeframe: At baseline, 2 weeks and 4 weeks into the intervention period, and then 2 weeks post-intervention

Change from baseline von Willebrand factor (VWF)

Timeframe: At baseline, 2 weeks and 4 weeks into the intervention period, and then 2 weeks post-intervention

Change from baseline augmentation index (AI)

Timeframe: At baseline, 2 weeks and 4 weeks into the intervention period, and then 2 weeks post-intervention

Change from baseline systolic blood pressure (SBP)

Timeframe: At baseline, 2 weeks and 4 weeks into the intervention period, and then 2 weeks post-intervention

Change from baseline fractional exhaled nitric oxide (FeNO)

Timeframe: At baseline, 2 weeks and 4 weeks into the intervention period, and then 2 weeks post-intervention