Q. A 55-year-old man with a long history of smoking presents to your primary care clinic with complaints of chronic cough, increased sputum production, and progressive shortness of breath over the past few years. His temperature is 98.6°F (37°C), pulse 88 beats per minute, blood pressure 130/70 mmHg, and respiratory rate 16 per minute. His oxygen saturation on room air is 94%. Physical examination shows hyperresonance to percussion on the chest and decreased breath sounds on auscultation. Spirometry is performed, and the results after bronchodilator inhalation show an FEV1 (forced expiratory volume in one second) of 48% predicted and an FEV1/FVC (forced vital capacity) ratio of less than 0.7. What do these spirometry findings indicate, and what is the most likely diagnosis for this patient?