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Patients with COPD may be missing out on appropriate treatment because of incorrect or no diagnosis

07.09.2004


Patients with Chronic Obstructive Pulmonary Disease (COPD) are frequently misdiagnosed or remain undiagnosed, and may therefore be missing out on appropriate treatment, according to the results of a primary care study presented today at the annual European Respiratory Society (ERS) meeting in Glasgow, Scotland.1

COPD is a progressive respiratory disease that causes significant deterioration of lung function and chronic breathlessness that can lead to severe disability.2 Limited airflow associated with COPD leads to excess air being trapped in the lungs after a person has exhaled. This condition, known as "air trapping", is a primary cause of breathlessness, which often restricts a person’s ability to perform daily activities such as walking up stairs or taking a shower.3,4

Although COPD is the fourth leading cause of death worldwide, claiming 2.75 million lives annually,5 it is estimated that up to 75% of patients in Europe6 and 50% in the United States are undiagnosed.7 Results of the study presented today at the ERS congress showed that more than half of those affected with COPD may first be incorrectly diagnosed with asthma by their primary care physician.1



"The level of misdiagnosis and under diagnosis seen in this study is very concerning," said Professor David Price, Chair of Primary Care, Respiratory, University of Aberdeen, UK, and principal study investigator. "Although recent guidelines for COPD emphasise the importance of accurate diagnosis, this has been challenging in primary care. There has been varied evidence for COPD signs and symptoms, and insufficient tools to make an accurate diagnosis. As a result, patients are suffering unnecessarily because they’re not receiving appropriate treatment."

The study presented at ERS enrolled 597 patients recruited from primary care practices in the UK and US aged 40 years or older with prior diagnoses or medications consistent with obstructive lung disease, but not previously diagnosed with COPD.1 Patients were given a study diagnosis based on spirometry.

Approximately 40% of patients in the study were found to have COPD.1 Of these:

51.5% reported a prior diagnosis of asthma only1
10.6% reported no prior diagnosis of obstructive lung disease1
37.9% reported a prior diagnosis of COPD component diseases (chronic bronchitis or emphysema).1

Among those COPD sufferers originally misdiagnosed with asthma, or with no prior diagnosis of obstructive lung disease, only 3.5% were receiving anticholinergic treatments,1 which together with beta-agonists are central to the symptomatic management of COPD.8

"It’s time for primary care professionals to re-think their approach to COPD to ensure patients receive an early, correct diagnosis and appropriate, effective treatment. Early intervention with smoking cessation therapy may slow disease progression, and appropriate medical therapy may slow the deterioration in patient quality of life seen with COPD," Professor Price said.

Additional study results presented at ERS showed that diagnosis of COPD in ’at risk’ groups (smokers and ex-smokers over 40 years of age) could be vastly improved if patients were asked a few symptom-based diagnostic questions to assess their lung health.9 If these questions were used for screening purposes in a primary care practice setting, testing 1000 people at high risk would lead to 297 spirometric examinations and 110 new diagnoses of COPD.9

"This simple questionnaire promises to be a cost-effective means of improving diagnosis rates, and thus appropriate management of one of the most common, debilitating and costly conditions seen in primary care," Professor Price said.

Patrick Ward | EurekAlert!
Further information:
http://www.shirehealthinternational.com

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