Quantitative and qualitative evaluation of spirometry for COPD screening in general practice.

Area of Science:

• Pulmonary Medicine
• Diagnostic Accuracy
• Primary Care

Background:

• Accurate diagnosis of Chronic Obstructive Pulmonary Disease (COPD) is challenging.
• Spirometry in primary care can potentially reduce misdiagnosis.
• The reliability of primary care spirometry requires evaluation.

Purpose of the Study:

• To assess the validity of spirometry performed in primary care settings.
• To determine the accuracy of airflow limitation diagnoses using primary care spirometry.

Main Methods:

• Screening spirometry was conducted by general practitioners (GPs) or trained nurses/technicians.
• Participants with airflow limitation or normal screening spirometry underwent confirmatory spirometry.
• Confirmatory spirometry was performed by trained nurses in a pulmonary function laboratory.

Main Results:

• 96.5% of screening spirometry tests were valid.
• Screening spirometry values correlated well with confirmatory spirometry (r=0.83).
• Screening spirometry showed 93% positive predictive value and 95% specificity for persistent airflow limitation.

Conclusions:

• Spirometry performed in primary care by trained staff reliably identifies persistent airflow limitation.
• This finding encourages collaboration between pulmonologists and primary care providers.
• Improved diagnostic accuracy for COPD can be achieved through primary care spirometry.