Abstract
Background: Asymptomatic Airflow Obstruction causes major health problem related to lung diseases worldwide, along with stress on health care infrastructure of the country. Obstructive Airway Disease also imposes economic burden and increase the out of pocket expenditure of the patient and the country.
 Material & Methods: The present prospective study was conducted at GCS Medical College, Hospital and Research Centre, Ahmadabad from January 2016 to December 2016. A sample size of 100 was calculated at 95% confidence interval at 10% acceptable margin. Patients were enrolled from outdoor and from ward by simple random sampling. Clearance from Institutional Ethics Committee was taken before start of study. Written informed consent was taken from each study participant.
 Results: In the present study, on the assessment of pulmonary function test, it was found that 70% of patient had normal PFT, 18% of patients had obstructive PFT and 12% of patients had restrictive PFT. On the assessment of obstructive airway disease by GOLD – Staging it was found that out of total study participants, 8% of patients had mild obstruction (Stage 1), 6% had moderate obstruction (Stage 2), 3% had severe obstruction (Stage 3) and 1% had very severe obstruction (Stage 4)
 Conclusion: there was high burden of undiagnosed asymptomatic obstructive airway disease reported among patients of different severities with males were more commonly affected than females. Therefore, use of Spirometry should be incorporate in all routine health check-ups.
 Key words: Obstructive Airway Disease, Asthma, Spirometry.
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