Khassawneh BY, et al. - Researchers performed a cross-sectional study at a referral center in Jordan recruiting male patients who underwent coronary angiography for suspected coronary artery disease (CAD) and reported ≥ 10 pack-year cigarette smoking to determine the prevalence and predictive factors of undiagnosed COPD in these men. Pre- and post-bronchodilator spirometry was performed on 376 men with mean age of 56.02±10.55 years. COPD was defined as post-bronchodilator FEV₁/FVC < 70%. The presence of CAD was confirmed with ≥ 50% coronary luminal narrowing. Male patients with CAD showed a high prevalence of COPD and most of these were underdiagnosed even though they had respiratory symptoms. They recommend evaluating male smokers with CAD and respiratory symptoms for airflow limitation and COPD.