Table. 1—

Indications for spirometry

 To evaluate symptoms, signs or abnormal laboratory tests
 To measure the effect of disease on pulmonary function
 To screen individuals at risk of having pulmonary disease
 To assess pre-operative risk
 To assess prognosis
 To assess health status before beginning strenuous physical activity programmes
 To assess therapeutic intervention
 To describe the course of diseases that affect lung function
 To monitor people exposed to injurious agents
 To monitor for adverse reactions to drugs with known pulmonary toxicity
Disability/impairment evaluations
 To assess patients as part of a rehabilitation programme
 To assess risks as part of an insurance evaluation
 To assess individuals for legal reasons
Public health
 Epidemiological surveys
 Derivation of reference equations
 Clinical research