In tutorial 5, we explore the most important variables used in the interpretation of spirometry.

Key messages:

• The FVC, FEV1, FEV1/FVC ratio and PEF measurements are important in the interpretation of spirometry.
• The FEV1/FVC ratio tells us how efficient the airways are.
• The spirometry report should contain the patient identifiers and demographics, a technical report from the HCP performing the test, the flow-volume loop and/or volume-time graph, and a table of the test results.