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Poor Indoor Air Quality Worsens Health Problems in COPD Patients
September 02, 2007 at 12:13 PM
Research News
While the exacerbating effects of outdoor pollutants on COPD patients have been well-documented, few studies have analyzed the impact of indoor air quality on COPD patients. COPD is the fourth leading cause of death in the U.S., and the fifth worldwide, according to lead investigator Liesl M. Osman, Ph.D.
Although exposure to outdoor pollution is important, most people spend the greater part of their time indoors, wrote Dr. Osman in the article that appears in the first issue for September of the American Journal of Respiratory and Critical Care Medicine, published by the American Thoracic Society.
Dr. Osman and a team of researchers in Aberdeen, Scotland, measured concentrations of indoor air pollutants in the homes of 148 Scottish patients who had mild to severe COPD. Over the course of a week, they took samples of particulate matter up to 2.5ėg (PM2.5) every five minutes, sampled indoor endotoxin concentrations and measured indoor NO2 with passive samplers. Recorded data on concentrations of outdoor PM2.5 were also collected from a nearby monitoring station.
The study participants completed the St. Georges Respiratory Questionnaire (SGRQ) to assess their symptoms, activity limitation and the impact of their disease. Each subject was also asked about their current smoking status, which was verified by salivary cotinine levels.
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