The effect of smoking habits on pulmonary function (Part 1)

In this report, pulmonary function tests (MEFVC and V-T curve) were performed for non-smoking students and for students who had acquired the smoking habit. The analyses were performed by MEFV pattern recognition, and by forward selection procedure (FSP) and all-possible selection procedure (APSP). The results were as follows; 1) In students with mild smoking habits, PF/Ht and V(75)/Ht showed a reduction compared with non-smoking students. 2) The MEFV pattern in students with mild smoking habits, was concave compared with that in non-smoking students; 3) FEV(1.0%), PF/Ht and V(50)/Ht were selected as effective parameters between non-smoking students and students with mild smoking habits on the results of FSP and APSP tests.