Interim report from burden of obstructive lung disease (BOLD Study) in Tehran: Prevalence and risk factors of chronic obstructive pulmonary disease

This study evaluated the prevalence, main causes, and risk factors of COPD in 271 residents in Tehran, Iran. Pre- and post-bronchodilator lung function testing (FEV1, FEV6, FVC) was performed using a Vitalograph In2itive spirometer.