Table 1.

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

	Before	After	P value
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

^*P < 0.05; **P < 0.001