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  To study effect of smoking on pulmonary function in adult man. Smoker groups 70 men who aged 40-65yrs and non-smoker groups 84 men who 40-65yrs were checked by medical process and pulmonary testing. Smoker groups were divided into four groups by smoking history and its divided three groups by number of cigarettes smoked per-day, control is non-smoker. The relationship of age of smoker and non-smoker with levels of pulmonary function testing.
  1. Relationship of duration of smoking with mean levels of pulmonary function test.
   1) Vital Capacity is 3.93L in control groups, 3.64L in ＜10yrs smoking group, 3.77L in 11-20yrs smoking group, 3.76L in 21-30yrs smoking group, 2.93L in ＞30yrs smoking group. ＞30yrs is significantly leaner than control groups.(p＜0.01).
   2) %FEV1 is 91.78% in control groups, 84.95% in ＜10yrs group, 90.34% in 11-20yrs group, 88.49% in 21-30yrs group, 83.88% in ＞30yrs. ＞30yrs smoking group is significantly leaner than control groups(p＜0.05).
   3) MVV is 115,95L/M in control groups, 113.5L/M in ＜10yrs smoking group, 97.17L/M in 11-20yrs smoking group, 101.24L/M in 21-30yrs smoking group, 76.17L/M in ＞30yrs smoking group. ＞30yrs smoking group is significantly leaner than control groups.(p＜0.01).
  2. Relationship of number of cigarettes smoked per day with mean levels of pulmonary test.
   1) VC is 3.93L in control groups, 3.97L in 1-10NCPD smoking group, 3.64L in 11-20NCPD smoking group, 3.90L in ＞20NCPD smoking group.
   2) %FEV1 is 91.78% in control groups, 91.01% in 1-10NCPD smoking group, 88.14% in 11-20NCPD smoking group, 86.54% in ＞20NCPD smoking group.
   3) MVV is 115.95L/M in control groups, 108.95L/M in 1-10NCPD smoking group, 108.4L/M in 11-20NCPD smoking group.
  3. Relationship of age of smoker and non-smoker with levels of pulmonary function test.
   1) VC 40-50 age is 3.94L in non-smoker groups and 3.89L in smoker groups. smoker groups 3.42L is significantly leaner than non-smoker groups(p＜0.05) in 50-60 age, smoker groups is significantly leaner than non-smoker groups(p＜0.05) in ＞60 age.
   2) %FEV1 is 91.6% in non-smoker groups and 88.61% in smoker groups in 40-50 age, 91.95% in non-smoker groups and 92.09% in smoker groups in 50-60 age, 79.20% in non-smoker groups and 87.32% in smoker groups in ＞60 age.
   3) MVV 40-50 age is 116.6L/M in non-smoker groups and 99.4L/M in smoker groups. smoker groups is significantly leaner than non-smoker groups(p＜0.01) in 40-50 age. 117.L/M in non-smoker groups, 95.90L/M in smoker groups in 50-60 age. smoker groups is significantly leaner than non-smoker groups(p＜0.01) in 50-60 age.
  Result this indicate that pulmonary function induces significantly change of smoking in middle and elderly men. And according to increase of age with respiratory muscle weakly, airway resistance increase in smoker than non-smoker.
  Conclunsionally, middle and elderly smoker is pulmonary function test with VC, %FEV1, MVV its must decrease.

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