FOLLOW-UP STUDY OF LUNG FUNCTION CHANGES FOR 10 YEARS IN THE ELDER PATIENTS WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASES AFTER WITHDRAWAL FROM SMOKING FOR 10 YEARS / 解放军医学杂志

To study changes of lung function for 10 years in the elder patients with chronic obstructive pulmonary diseases (COPD) who have quitted smoking for more than 10 years, 45 elder patients with COPD who had quitted smoking for more than 10 years were selected, and 11 elder patients with COPD who had never smoked were enrolled too. Routine lung function tests were performed. Initial values of VC, FVC, FEV 1 , PEF, MMEF, and MVV were compared with those 10 years later, and it was found the difference was significant ( P