PURPOSE: Early diagnosis of OAD can reduce morbidity and mortality as usually the symptoms appear at much later stage when disease has progressed significantly. Spirometry is rarely recommended as a routine test during annual health checks. In this study we aimed to address the importance of spirometry as an important screening tool for the early diagnosis of obstructive airway disease.
METHODS: In this cross-sectional randomised study, 874 subjects who visited Bombay Hospital Institute of Medical Sciences, Mumbai, India, for routine annual health check up, performed pre and post bronchodilator spirometry, and filled a questionnaire which captured information about respiratory health, risk factors and co-morbid conditions. COPD was defined as a post- bronchodilator FEV1/FVC < 70%. FEF25-75 < 50% of predicted was defined as small airway obstruction (SAO).
RESULTS: The overall prevalence of COPD was 5.78 %; amongst these 19% belonged to severe to very severe category, 74.4% belonged to moderate category and 7% belonged to mild category. SAO was present in 26.6% . 72.09% of COPD was not diagnosed previously. Amongst the COPD subjects diagnosed on spirometry, 72.1% had never smoked.
CONCLUSIONS: Use of spirometry during annual health check can identify a large number of OAD, usually previously undiagnosed. Spirometry should be one of the key investigations for routine health check plans.
CLINICAL IMPLICATIONS: spirometry should be used as an important diagnostic tool for health check/insurance plans. large number of obstructive airway diseases are not related to smoking.
DISCLOSURE: The following authors have nothing to disclose: Sujeet Rajan, Ratna Balakrishnan, Bill Brashier, Shilpa Sharma, Sapna Madas, Sandeep Salvi
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