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:6/26/2017)... Ruidoso, New Mexico (PRWEB) , ... June 26, ... ... sexual dysfunction, anorgasmia, and urinary leakage is revolutionizing the way women look and ... Mexico is tackling the problem of female sexual dysfunction and urinary leakage head ...
(Date:6/26/2017)... ... June 26, 2017 , ... If the devil ... lots of red these days. According to recent estimates, 75 – 80% of ... coding errors(1). Some studies point to Electronic Health Records (EHR) with automated features ...
(Date:6/26/2017)... ... June 26, 2017 , ... New patients with ... Angela Cotey, with or without a referral. Dr. Cotey is a trusted dentist who ... preferred tooth replacement option. , Patients with missing teeth in Fitchburg, WI, are encouraged ...
(Date:6/25/2017)... , ... June 24, 2017 , ... Create a feel-good lyric music video in Final ... and sound in the timeline and write in the lyrics to any song. ProLyric flies ... out. Each line of the text can be added modularly for optimal control. ProLyric makes ...
(Date:6/25/2017)... , ... June 25, 2017 , ... An increase in ... growing foliage and plants, and along with that; a humdinger of an allergy season. ... it also means an increase in misery-causing grass and weed pollen. , “Our ...
Breaking Medicine News(10 mins):
(Date:6/7/2017)... -- Endo International plc (NASDAQ: ENDP ) ... Joseph R. Goodwin , U.S. District Court Judge for ... , entered a case management order in MDL 2325, ... Litigation (the "MDL") that includes a provision requiring plaintiffs ... on specific causation within one hundred twenty (120) days ...
(Date:6/7/2017)... Specialty Infusion Group, a brand of Diplomat Pharmacy, Inc. (NYSE: DPLO), ... location. The Iowa ... 7 cleanroom—the standard needed to compound intravenous (IV) nutrition formulations. A ... "Our new cleanroom will allow ... Iowa patients," said Phil Rielly , ...
(Date:6/5/2017)... 2017 Kohll,s Pharmacy & Homecare is the first distributor ... States . The Raizer is a simple battery operated ... to an almost-standing position within a few minutes. ... assistant and does not require any extra effort besides ... child can operate it, and lightweight and portable ...
Breaking Medicine Technology: