Check patient demographics and test quality
Review the flow-volume loop
Look at FEV1, FVC, and FEV1/FVC ratio
Determine if the pattern is obstructive, restrictive, or mixed
Assess bronchodilator response
Review lung volumes if available
Check diffusion capacity (DLCO) if available
Compare results to predicted values and lower limit of normal
Grade severity if abnormal
Correlate findings with symptoms and clinical context