Navigation Links
Nearly 1 in 3 Asthma Cases May Be Misdiagnosed
Date:11/17/2008

Too many patients aren't getting a key lung test, experts say,,,,

MONDAY, Nov. 17 (HealthDay News) -- Almost one in three adults who've been told they have asthma may not have the chronic airway disease, new Canadian research claims.

The study, published in the Nov. 18 issue of the Canadian Medical Association Journal, included nearly 500 adults from eight Canadian cities. Researchers found that about 30 percent of those diagnosed with asthma had been misdiagnosed.

"When we evaluated these people with lung function tests and then took them off their medications, we couldn't find asthma in 29 percent of the non-obese and 32 percent of the obese," noted study author Dr. Shawn Aaron, head of the division of respiratory medicine at the Ottawa Health Research Institute at the University of Ottawa, Ontario.

Aaron said the original goal of the study was to see if asthma was misdiagnosed more often in obese individuals, because the prevalence of asthma is twice as high in this group. However, he said, there was no statistical difference in the rates of overdiagnosis based on body weight.

And even though the study was not designed to confirm or refute the idea that the obese are more likely to have asthma, it did support the notion that obese people truly do have a higher incidence of the disease.

For the study, the researchers randomly recruited 496 Canadian adults -- 242 obese and 254 non-obese -- from eight Canadian cities. All had been diagnosed as having asthma by physicians.

The study participants underwent lung function testing, and if they performed well on the lung function test, were given an airway "challenge" test. People with asthma aren't expected to do well on this test.

Those that passed the airway challenge were gradually tapered off their asthma medications. Aaron was quick to point out that this is not something anyone should attempt on their own; it should only be done under a doctor's supervision.

Based on these tests, the diagnosis of asthma was excluded in 28.7 percent of the non-obese and 31.8 percent of the obese.

After a six-month follow-up period, Aaron said that only 8 percent had symptoms significant enough to warrant a health-care visit.

Aaron said that some of the misdiagnosed cases could result from bad viral infections, the symptoms of which can last for several months. And the main reason people are misdiagnosed is because doctors don't always perform a key lung function test called spirometry.

In the same issue of the journal, editorial authors Drs. Matthew Stanbrook and Alan Kaplan pointed out that trying to manage asthma without doing lung function testing was akin to trying to manage high blood pressure without taking blood pressure readings or high cholesterol without measuring cholesterol levels in the blood.

"You need to have some objective measure. You can't diagnose asthma based on patient symptoms alone," added Dr. Jennifer Appleyard, chief of allergy and immunology at St. John Hospital in Detroit. She said the issue of misdiagnosis is of concern in the United States, just as it is in Canada.

Appleyard agreed that viral infections can be mistaken for asthma, but said that other serious problems can also be mistaken for asthma, such as chronic obstructive pulmonary disease (COPD) and congestive heart failure.

Both Aaron and Appleyard said they hope these findings don't cause doctors to stop diagnosing asthma, because Appleyard said asthma is still underdiagnosed in some cases. But they suggest that more doctors should include spirometry in their practice or refer their patients to doctors who do perform spirometry to confirm the asthma diagnosis.

More information

To learn more about asthma, visit the Nemours Foundation.



SOURCES: Shawn Aaron, M.D., head, division of respiratory medicine, Ottawa Health Research Institute, University of Ottawa, Canada; Jennifer Appleyard, M.D., chief, allergy and immunology, St. John Hospital, Detroit; Nov. 18, 2008, Canadian Medical Association Journal


'/>"/>
Copyright©2008 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. ReBuilder Medical Technologies, Inc. Reports Monthly Sales in 2007 Nearly Doubling Monthly Sales in 2006, Including Record Daily Sales in September 2007
2. Nearly 30 Percent of Realtors(R) Lack Health Insurance
3. New Poll Finds Nearly Seven in 10 New Jersey Voters Support Smoke-Free Casinos
4. New Pharmaceutical Sales Force Communication Metrics: Nearly 6 Weeks of Sales Time per Rep Wasted Each Year
5. Anticancer Drugs Targeting the ErbB (EGFr/HEr2) Pathway Alone Generated Global Sales of Nearly $5 Billion in the First Nine Months of 2007
6. K-State Researchers Predict That an Outbreak of Foot-And-Mouth Disease Could Cost Kansas Nearly a Billion Dollars
7. Smokers Cost Medicaid System Nearly $10 Billion
8. Research Indicates Nearly 25 Percent of Supplements Are Contaminated With Steroids, Stimulants and Banned Substances
9. Cipla Offers Modest AIDS Drug Price Cut: Not Nearly Enough, says AHF
10. Metabolic syndrome affects nearly 1 in 10 US teens
11. Eleven Florida Nonprofit Organizations to Receive Grants Totaling Nearly $1 Million From The Blue Foundation
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Nearly 1 in 3  Asthma Cases May Be Misdiagnosed
(Date:1/17/2017)... ... 2017 , ... Anesthesia Progress – Everyone wants less pain during ... option for each patient. Dentists have several general anesthesia alternatives and finding the right ... the Tokyo Dental College in Tokyo, Japan wanted to find out which anesthetic was ...
(Date:1/17/2017)... ... January 17, 2017 , ... ... Healthful-Flex. , The company, owned and operated by Ed Stroup, was created ... reasonable price with the highest level of customer service. Healthful Balance products can ...
(Date:1/17/2017)... Clemente, CA (PRWEB) , ... January 17, 2017 ... ... Diego County, as well as Palm Desert, is opening a new office in ... Brainsway deep transcranial magnetic stimulation (dTMS) in Southern California, successfully treating individuals struggling ...
(Date:1/17/2017)... ... 2017 , ... A prescription medication bottle, pocket knife, luggage and a solar-powered ... Product Design Challenge , the Cradle to Cradle Products Innovation Institute has ... scheduled to run through early 2018. The challenges are presented by the Institute in ...
(Date:1/17/2017)... CA (PRWEB) , ... January 17, 2017 , ... Livionex, ... the results of a double blind clinical study for its dental gel that shows ... leading national brand of toothpaste containing triclosan. The study was conducted at the Beckman ...
Breaking Medicine News(10 mins):
(Date:1/17/2017)... 17, 2017  Zimmer Biomet Holdings, Inc. (NYSE and ... today announced that it has implemented a ... the Zimmer Biomet management team. Effective January 23, ... the position of President, Americas and join the ... served as Zimmer Biomet,s Vice President of U.S. ...
(Date:1/17/2017)... Research and Markets has announced the addition of the ... ... laparotomy sponges market to grow at a CAGR of 7.94% during ... 2016-2020, has been prepared based on an in-depth market analysis with ... its growth prospects over the coming years. The report also includes ...
(Date:1/17/2017)... BELLEFONTE, Pa. , Jan. 17, 2017 /PRNewswire/ ... Medical, Inc.(AMI) announces the addition of 6 senior ... of the TubeClear® System.  These sales leaders were ... recently acquired medical device company. Repeatedly recognized for ... of exceeding customer expectations and establishing relationships with ...
Breaking Medicine Technology: