Terms and privacy: Lungclock only provides an estimated lung age derived from the references below and in no way seeks to replace spirometry as an accurate lung function test. Morris JF Koski A Johnson LC. Spirometric standards for healthy non-smoking adults.
Am Rev Respir Dis
1971;103:57-67 Xu X Weiss ST Rijcken B Schouten JP. Smoking changes in smoking habits and rate of decline in FEV1: new insight into gender differences.
Eur Respir J
1994;7:1056-61. Morris JF Temple W. Spirometric “lung age” estimation for motivating smoking cessation.