Indoor Air Quality and Respiratory Symptoms in Former Smokers

Completed · Not applicable · Has a placebo group

Conditions studied: Chronic Obstructive Pulmonary Disease

In brief

The investigators will conduct a randomized, controlled, double-blind, crossover trial to determine whether the presence of a portable high-efficiency indoor air filter in the bedroom reduces respiratory symptoms in former smokers compared with placebo. The primary outcomes will be change in St. George's Respiratory Questionnaire - COPD (SGRQ-C) score associated with using a portable high-efficiency indoor air filter during the study period. Secondary outcomes of COPD exacerbations and hospitalizations, daily step counts, medication changes, spirometry, and cardiovascular outcomes will also be assessed.

Key facts

Study ID

NCT02956213

Run by

Intermountain Health Care, Inc.

People needed

52

Starts

2016-11-01

Expected to finish

2019-06-01

Last updated by the study team

2019-06-13

Who can join

Age: 40 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• history of smoking
• Do not currently smoke and no one currently smokes inside the home
• history of exacerbation or development of respiratory symptoms (e.g.cough, sputum production, chest tightness, exertional dyspnea, etc.) with periods of high outdoor air pollution ("inversions")
• Age 40 or older
• Access to Wi-Fi
• Access to a cell phone, tablet or personal computer

You may not qualify if…

• active tobacco use of subject
• active tobacco use in the home
• pre-existing use of a HEPA filter in the subject's bedroom

Where it is running

• Intermountain Medical Center — Salt Lake City, Utah, United States

Full record on ClinicalTrials.gov

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