Smoking habit

No

FVC in Litre

FVC%

FEV1 in Litre

FEV1%

PEFR Litre/Sec

Non-smoker

55

3.96 ± 0.39

88.85 ± 7.27

2.91 ± 0.63

74.93 ± 15.48

7.26 ± 1.005

Smoker

53

3.88 ± 0.48

87.40 ± 8.55

2.44 ± 0.71

62.72 ± 17.35

6.42 ± 1.01

t-test

0.93

0.96

3.58

3.86

4.31

p value

0.356

0.341

0.001

0.0001

0.0001