Featured Research

from universities, journals, and other organizations

Marijuana Worsens COPD Symptoms In Current Cigarette Smokers

Date:
May 23, 2007
Source:
American Thoracic Society
Summary:
Marijuana worsens breathing problems in current smokers with chronic obstructive pulmonary disease (COPD), according to a new study. The study found that among people 40 and older, smokers were two-and-a-half times as likely as nonsmokers to develop COPD, while smoking cigarettes and marijuana together boosted the odds of developing COPD to three-and-a-half times the risk of someone who did not smoke either cigarettes or marijuana.

Marijuana worsens breathing problems in current smokers with chronic obstructive pulmonary disease (COPD), according to a new study.

The study found that among people 40 and older, smokers were two-and-a-half times as likely as nonsmokers to develop COPD, while smoking cigarettes and marijuana together boosted the odds of developing COPD to three-and-a-half times the risk of someone who did not smoke either cigarettes or marijuana--in other words, adding marijuana smoking to cigarette smoking increased the risk by one-third, says Wan Tan, M.D., of St. Paul's Hospital in Vancouver, British Columbia.

The odds of cigarette smokers having any respiratory symptoms was 2.36 times that of nonsmokers, while the odds of someone who smoked both cigarettes and marijuana having respiratory symptoms was 18 times that of someone who smoked neither--an eightfold jump in risk, Dr. Tan says.

"This study suggests an interaction between cigarettes and marijuana smoking. These findings have not been reported before, and they have a big public health implication," Dr. Tan says.

A majority of cigarette smokers in the study were also marijuana smokers. In both younger and older adults in the study, 30% smoked both cigarettes and marijuana. Among younger cigarette smokers, 76% also smoked marijuana, while 58% of older cigarette smokers also smoked marijuana.

The findings come from a study of 648 adults ages 18 and older who answered questions on smoking, including their cigarette and marijuana use, and respiratory symptoms. Study subjects ages 40 and older had lung function tests.

The Vancouver researchers decided to study both marijuana and cigarette smoking because both cigarette and marijuana smoking is prevalent in their area, says Dr. Tan. They found that 49% of participants ages 18 to 39 and 46% of those 40 and older had smoked marijuana at least once. Among 18-39 year-olds, 17% said they currently smoked marijuana, compared with 13% in the 40+ age group. In the younger group, 31% said they had ever smoked cigarettes, and 16% were current smokers. In the 40+ group, 52% were ever-smokers while 16% were current smokers.

This research was presented at the American Thoracic Society 2007 International Conference, on Tuesday, May 22. "The Impact of Cigarette and Marijuana Smoking in Chronic Obstructive Lung Disease Study in Vancouver, Canada" (Session C38; Abstract # 681; Poster Board # L42)


Story Source:

The above story is based on materials provided by American Thoracic Society. Note: Materials may be edited for content and length.


Cite This Page:

American Thoracic Society. "Marijuana Worsens COPD Symptoms In Current Cigarette Smokers." ScienceDaily. ScienceDaily, 23 May 2007. <www.sciencedaily.com/releases/2007/05/070521145539.htm>.
American Thoracic Society. (2007, May 23). Marijuana Worsens COPD Symptoms In Current Cigarette Smokers. ScienceDaily. Retrieved July 24, 2014 from www.sciencedaily.com/releases/2007/05/070521145539.htm
American Thoracic Society. "Marijuana Worsens COPD Symptoms In Current Cigarette Smokers." ScienceDaily. www.sciencedaily.com/releases/2007/05/070521145539.htm (accessed July 24, 2014).

Share This




More Health & Medicine News

Thursday, July 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

New Painkiller Designed To Discourage Abuse: Will It Work?

New Painkiller Designed To Discourage Abuse: Will It Work?

Newsy (July 24, 2014) The FDA approved Targiniq ER on Wednesday, a painkiller designed to keep users from abusing it. Like any new medication, however, it has doubters. Video provided by Newsy
Powered by NewsLook.com
Doctor At Forefront Of Fighting Ebola Outbreak Gets Ebola

Doctor At Forefront Of Fighting Ebola Outbreak Gets Ebola

Newsy (July 24, 2014) Sheik Umar Khan has treated many of the people infected in the Ebola outbreak, and now he's become one of them. Video provided by Newsy
Powered by NewsLook.com
Condemned Man's US Execution Takes Nearly Two Hours

Condemned Man's US Execution Takes Nearly Two Hours

AFP (July 24, 2014) America's death penalty debate raged Thursday after it took nearly two hours for Arizona to execute a prisoner who lost a Supreme Court battle challenging the experimental lethal drug cocktail. Duration: 00:55 Video provided by AFP
Powered by NewsLook.com
Can Watching TV Make You Feel Like A Failure?

Can Watching TV Make You Feel Like A Failure?

Newsy (July 24, 2014) A study by German researchers claims watching TV while you're stressed out can make you feel guilty and like a failure. Video provided by Newsy
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