(c) 2011 Lung Clock. Terms and Privacy
LungClock only provides an estimated lung age derived from the references below and in know way seeks to replace spirometry as an accurate lung function test. Morris JF, Koski A,Johnson LC. Spirometric standards for healthy nonsmoking 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. Prev Med 1985;14:655-62.