Follow-up study of lung function for 10 years in health elder of differential age

Objective: To study the changes and the data of lung functions in the health elder of differential age. Methods: The lung functions were follow up by the time after physical examination, chest x ray,electrocardiogram. Results: The forced expiratory volume in 1 second/Forceal vital capacity（FEV1%） of inital data compared with FEV1% of data after 10 years are no statistics satisfactory in the 60－64 age and 65－69 age. FEV1% of initial data compared with FEV1% of data after 10 years is P＜0.05 in the over 70 age old.Peak expiratory flow（PEF）、total lung capacity （TLC） of initial data compared with PEF, TLC of data after 10 years are P＜0.05, in the 60-64 age old;P＜0.01in the 65-69 age old and over 70 age old. Vital capacity （VC）, forced vital capacity （FVC）, the forced expiratory volume in 1second（FEV1）,maximal voluntary ventilation（MVV）, maximal mid-expiratory flow curue（MMEF）,functional resideal capacity（FRC）,residual volume（RV）,RV/TLC of initial data companed with these of data after 10 years are P＜0.01 in the differential age group VC、FVC、FEV1、FEV1%、PEF、MVV、MMEF、FRC、TLC、RV、RV/TLC of every year change data are P＞0.05 in the differential age Conclusions: The lung functions change with in crease of age; FEV1%,PEF,TLC is more distinctly; data of changes of every year is no statistics satisfactory in the differential age group