Office spirometry correlates with laboratory spirometry in patients with symptomatic asthma and COPD

Area of Science:

• Pulmonary Medicine
• Diagnostic Accuracy
• Respiratory Physiology

Background:

• Spirometry is crucial for diagnosing obstructive lung diseases like asthma and COPD.
• Underutilization of spirometry hinders effective patient management.
• Previous comparisons of office spirometry (OS) and laboratory spirometry (LS) focused on healthy individuals.

Purpose of the Study:

• To assess the correlation between OS and LS in patients with symptomatic obstructive lung disease.
• To determine the accuracy and reliability of OS compared to LS in this specific patient population.

Main Methods:

• Retrospective analysis of spirometry data from 107 patients with obstructive lung disease who underwent both OS and LS.
• Comparison of data using Bland Altman analysis.
• Utilized two types of flow-sensing portable spirometers for OS.

Main Results:

• Significant positive correlation found between OS and LS for FEV1 (r=0.937) and FVC (r=0.90).
• 87% of patients showed concordant results regarding airflow obstruction.
• Correlation was consistent across different office spirometer devices.

Conclusions:

• Office spirometry (OS) is an accurate and reliable tool for evaluating patients with asthma and COPD.
• Routine implementation of OS can enhance spirometry utilization and improve patient health outcomes.
• Encouraging OS use can lead to better management of obstructive lung diseases.