Table 1 Clinical data of subjects before and after short-term smoking cession

Body weight (kg)

77.23 ± 10.24

79.62 ± 12.48

0.026*

Expiratory CO (ppm)

8.15 ± 2.97

3.01 ± 1.04

0.000**

Tobacco dependence score

6.69 ± 2.02

0.00 ± 0.00

0.000**

FEV1 (L)

2.80 ± 0.80

2.84 ± 0.79

0.337

FEV1% pred

83.21 ± 20.87

85.02 ± 19.16

0.459

FVC (L)

3.84 ± 0.00

3.97 ± 0.87

0.277

FVC% pred

96.09 ± 21.56

100.47 ± 17.39

0.133

FEV1/FVC%

72.89 ± 10.23

70.79 ± 8.66

0.301

FEF25 (L/S)

4.18 ± 2.03

5.02 ± 1.92

0.043*

FEF25% pred

53.26 ± 21.78

62.21 ± 23.08

0.076

FEF50 (L/S)

3.17 ± 1.63

3.06 ± 1.56

0.623

FEF50% pred

68.01 ± 36.89

65.81 ± 35.77

0.632

FEF75 (L/S)

1.22 ± 0.96

0.90 ± 0.44

0.321

FEF75% pred

51.66 ± 17.74

47.30 ± 19.92

0.338

MMEF (L/S)

2.30 ± 0.99

2.21 ± 1.01

0.599

MMEF% pred

59.44 ± 25.65

56.76 ± 24.49

0.550

PEF (L/S)

5.13 ± 1.83

5.93 ± 1.66

0.054

PEF% pred

53.63 ± 18.41

61.58 ± 16.61

0.096