Featured Research

from universities, journals, and other organizations

Indoor air cleaners ease asthma symptoms in children living with smokers, study suggests

Date:
August 1, 2011
Source:
Johns Hopkins Medical Institutions
Summary:
Children who have asthma and live with smokers shows that indoor air cleaners can greatly reduce household air pollution and lower the rates of daytime asthma symptoms to those achieved with certain anti-inflammatory asthma drugs. Although the air cleaners improved the overall air quality in homes, they did not reduce air nicotine levels and did not counter all ill effects of secondhand smoke, the researchers warn.

A Johns Hopkins Children's Center study of Baltimore City children who have asthma and live with smokers shows that indoor air cleaners can greatly reduce household air pollution and lower the rates of daytime asthma symptoms to those achieved with certain anti-inflammatory asthma drugs. Although the air cleaners improved the overall air quality in homes, they did not reduce air nicotine levels and did not counter all ill effects of second-hand smoke, the researchers warn.

Parents should be counseled to implement a total ban on indoor smoking and use air cleaners only as a temporary tool on the way to achieving a smoke-free household, the Hopkins team concludes in the Aug. 1 issue of the Archives of Pediatrics & Adolescent Medicine.

"Air cleaners appear to be a an excellent partial solution to improving air quality in homes of children living with a smoker but should not be viewed as a substitute for a smoke-free environment," says lead investigator Arlene Butz, Sc.D., M.S.N., C.P.N.P., an asthma specialist at Johns Hopkins Children's and professor of pediatrics at the Johns Hopkins University School of Medicine.

For the study, researchers followed for six months 115 children, ages 6 to 12 years, who lived in homes where one or more caregivers smoked. Each one of 41 households received two free-standing air cleaners plugged into the bedroom and living room. Another one-third of the homes got air cleaners plus at-home health education by a nurse on the dangers of second-hand smoke, and the other third got neither but were given air cleaners at the end of the study. The researchers measured air nicotine levels and air particulate matter -- microscopic bits of smoke, soil, pollen, dust and spores usually floating around in the air -- before air cleaner installation and six months later. They also compared asthma symptoms and cotinine (the biological marker of nicotine found in the urine) between children living in homes with and without air cleaners.

The overall air quality in homes with air cleaners showed a nearly 50-percent drop in the levels of particulate matter, although the air never reached the quality of smoke-free homes, the researchers note. Homes that received both air cleaners and visits by health coaches did not achieve better air quality than homes that got air cleaners alone. The levels of air nicotine and urine cotinine remained similar in all children, regardless of air cleaner use in the home.

The study also found that children living in homes with air cleaners had considerably more days without coughing, wheezing or difficulty breathing compared with children living in homes without air cleaners. Based on the rate of symptom reduction observed in this study, the researchers estimate that a child with asthma living in a home with indoor air filtration would, on average, have 33 more symptom-free days per year compared with a child living in a smoking household without indoor filtration. The number of symptom-free days made possible by the air cleaners was nearly the same as the number achieved with the use of a type of anti-inflammatory asthma drug in another study, the investigators note.

"Our findings show a clear link between improved asthma symptoms and the use of air cleaners, providing further evidence that air cleaners could play an important role in the treatment of children with asthma," said co-investigator Patrick Breysse, Ph.D., professor at the Johns Hopkins Bloomberg School of Public Health and director of the Johns Hopkins Center for Childhood Asthma in the Urban Environment.

Because smoking is a main driver of indoor air pollution, the researchers recommend the use of air cleaners even in smoke-free homes if they are part of multi-family dwellings in which second-hand smoke can easily seep in from surrounding units.

Asthma is the most common pediatric chronic illness, affecting 6.5 million children in the United States, according to the Centers for Disease Control and Prevention. More than 30 percent of children in the United States share a home with a smoker, and up to two-thirds of children in urban neighborhoods live with a least one smoker, the researchers say.

The study was funded by the National Institutes of Environmental Health Science, the National Institutes of Health and by the Environmental Protection Agency.

Other investigators in the study besides Butz and Breysse, included Elizabeth Matsui, M.D. M.H.S.; Jean Curtin-Brosnan, M.A.; Peyton Eggleston, M.D.; Gregory Diette, M.D. M.P.H.; D'Ann Williams, Dr.PH; Jie Yuan, B.S.; John Bernert, Ph.D.; and Cynthia Rand, Ph.D., all of Hopkins.


Story Source:

The above story is based on materials provided by Johns Hopkins Medical Institutions. Note: Materials may be edited for content and length.


Journal Reference:

  1. Arlene M. Butz et al. A Randomized Trial of Air Cleaners and a Health Coach to Improve Indoor Air Quality for Inner-City Children With Asthma and Secondhand Smoke Exposure. Archives of Pediatrics & Adolescent Medicine, August 2011 DOI: 10.1001/archpediatrics.2011.111

Cite This Page:

Johns Hopkins Medical Institutions. "Indoor air cleaners ease asthma symptoms in children living with smokers, study suggests." ScienceDaily. ScienceDaily, 1 August 2011. <www.sciencedaily.com/releases/2011/08/110801161411.htm>.
Johns Hopkins Medical Institutions. (2011, August 1). Indoor air cleaners ease asthma symptoms in children living with smokers, study suggests. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2011/08/110801161411.htm
Johns Hopkins Medical Institutions. "Indoor air cleaners ease asthma symptoms in children living with smokers, study suggests." ScienceDaily. www.sciencedaily.com/releases/2011/08/110801161411.htm (accessed July 31, 2014).

Share This




More Health & Medicine News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

House Republicans Vote to Sue Obama Over Healthcare Law

House Republicans Vote to Sue Obama Over Healthcare Law

Reuters - US Online Video (July 31, 2014) The Republican-led House of Representatives votes to sue President Obama, accusing him of overstepping his executive authority in making changes to the Affordable Care Act. Mana Rabiee reports. Video provided by Reuters
Powered by NewsLook.com
Despite Health Questions, E-Cigs Are Beneficial: Study

Despite Health Questions, E-Cigs Are Beneficial: Study

Newsy (July 31, 2014) Citing 81 previous studies, new research out of London suggests the benefits of smoking e-cigarettes instead of regular ones outweighs the risks. Video provided by Newsy
Powered by NewsLook.com
Dangerous Bacteria Kills One in Florida

Dangerous Bacteria Kills One in Florida

AP (July 31, 2014) Sarasota County, Florida health officials have issued a warning against eating raw oysters and exposing open wounds to coastal and inland waters after a dangerous bacteria killed one person and made another sick. (July 31) Video provided by AP
Powered by NewsLook.com
Health Insurers' Profits Slide

Health Insurers' Profits Slide

Reuters - Business Video Online (July 30, 2014) Obamacare-related costs were said to be behind the profit plunge at Wellpoint and Humana, but Wellpoint sees the new exchanges boosting its earnings for the full year. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



    Save/Print:
    Share:

    Free Subscriptions


    Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

    Get Social & Mobile


    Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

    Have Feedback?


    Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
    Mobile: iPhone Android Web
    Follow: Facebook Twitter Google+
    Subscribe: RSS Feeds Email Newsletters
    Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins