Featured Research

from universities, journals, and other organizations

Exposure To Coarse Air Pollution Not Associated With Hospital Admission For Respiratory Diseases

Date:
May 15, 2008
Source:
Johns Hopkins University Bloomberg School of Public Health
Summary:
Exposure to coarse particulate matter air pollution such as from agricultural activities, windblown dust and mechanical grinding is not statistically significantly associated with emergency hospital admissions for respiratory and cardiovascular diseases among Medicare patients This is the largest US nationwide study on the acute health effects of coarse particle pollution. Coarse particles are airborne pollutants that fall between 2.5 and 10 microns in diameter.

Researchers at the Johns Hopkins Bloomberg School of Public Health have conducted the largest nationwide study on the acute health effects of coarse particle pollution. Coarse particles are airborne pollutants that fall between 2.5 and 10 microns in diameter. These particles are larger than fine particles (less than 2.5 microns) and are produced by processes such as mechanical grinding, windblown dust and agriculture. These particles are of interest from both public health and regulatory perspectives.

The researchers examined associations between daily changes in hospital admissions rates for cardiovascular and respiratory outcomes and daily changes in coarse and fine particulate matter levels for 108 urban U.S. counties, which included approximately 12 million people enrolled in Medicare during the years 1999 through 2005.

The study found no evidence of an association between daily changes in coarse particles and the number of hospital admissions for respiratory diseases. The study found evidence of an association with hospital admissions for cardiovascular diseases. After taking into account fine particle levels, the association with coarse particles remained but was no longer statistically significant. The study also found that the risk of a cardiovascular hospital admission due to coarse particles was higher in more urban counties.

"Overall, the evidence was mixed, but the data suggest a link between cardiovascular admissions and ambient exposure to coarse particulate matter. This association was not statistically significant when we adjusted for fine particulate matter," said Roger D. Peng, PhD, lead author of the study and an assistant professor in the Bloomberg School's Department of Biostatistics.

"Although the evidence was not conclusive, the benefit of our approach is that it can be easily replicated when new data become available. Given that we found an association with coarse particles before taking into account fine particulate matter, our findings need consideration when the Environmental Protection Agency's standard for particles in the air is next reviewed."

The EPA regulates the levels of fine particle pollution, but does not yet have a standard for coarse particle pollution.

Previous studies by the Hopkins researchers demonstrated a strong link between fine particulate matter pollution and increased hospital admissions for cardiovascular and respiratory illnesses.

"We found continued evidence of an association between fine particulate matter and risk for hospitalization in this new data set, an extension by three years of our previous analyses," said senior author Francesca Dominici, PhD, professor in Biostatistics. "We urge continued monitoring of the coarse fraction of particulate matter so that further studies can be carried out."

The researchers were funded by grants from the Environmental Protection Agency, the National Institute for Environmental Health Sciences, the NIEHS Center in Urban Environmental Health and the Health Effects Institute.


Story Source:

The above story is based on materials provided by Johns Hopkins University Bloomberg School of Public Health. Note: Materials may be edited for content and length.


Journal Reference:

  1. Roger D. Peng, PhD; Howard H. Chang, BS; Michelle L. Bell, PhD; Aidan McDermott, PhD; Scott L. Zeger, PhD; Jonathan M. Samet, MD; and Francesca Dominici, PhD. Coarse Particulate Matter Air Pollution and Hospital Admission for Cardiovascular and Respiratory Diseases Among Medicare Patients. JAMA. 2008;299[18]:2172-2179

Cite This Page:

Johns Hopkins University Bloomberg School of Public Health. "Exposure To Coarse Air Pollution Not Associated With Hospital Admission For Respiratory Diseases." ScienceDaily. ScienceDaily, 15 May 2008. <www.sciencedaily.com/releases/2008/05/080513171430.htm>.
Johns Hopkins University Bloomberg School of Public Health. (2008, May 15). Exposure To Coarse Air Pollution Not Associated With Hospital Admission For Respiratory Diseases. ScienceDaily. Retrieved April 25, 2014 from www.sciencedaily.com/releases/2008/05/080513171430.htm
Johns Hopkins University Bloomberg School of Public Health. "Exposure To Coarse Air Pollution Not Associated With Hospital Admission For Respiratory Diseases." ScienceDaily. www.sciencedaily.com/releases/2008/05/080513171430.htm (accessed April 25, 2014).

Share This



More Earth & Climate News

Friday, April 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deadly Fungus Killing Bats, Spreading in US

Deadly Fungus Killing Bats, Spreading in US

AP (Apr. 24, 2014) A disease that has killed more than six million cave-dwelling bats in the United States is on the move and wildlife biologists are worried. White Nose Syndrome, discovered in New York in 2006, has now spread to 25 states. (April 24) Video provided by AP
Powered by NewsLook.com
New Pictures of Ship That Sank in 1888

New Pictures of Ship That Sank in 1888

AP (Apr. 24, 2014) Federal researchers have released new images of the City of Chester, a steamship that sank in San Francisco Bay in 1888. Researchers recently found the shipwreck while mapping shipping routes. (April 24) Video provided by AP
Powered by NewsLook.com
Risk of Asteroid Hitting Earth Higher Than Thought, Study Shows

Risk of Asteroid Hitting Earth Higher Than Thought, Study Shows

Reuters - US Online Video (Apr. 23, 2014) A group of space explorers say the chance of a city-obliterating asteroid striking Earth is higher than scientists previously believed. Deborah Gembara reports. Video provided by Reuters
Powered by NewsLook.com
UN Joint Mission Starts Removing Landmines in Cyprus

UN Joint Mission Starts Removing Landmines in Cyprus

AFP (Apr. 23, 2014) The UN mission in Cyprus (UNFICYP) led a mine clearance demonstration on Wednesday in the UN-controlled buffer zone where demining operations are being conducted near the Cypriot village of Mammari. Duration: 01:00 Video provided by AFP
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