Table 1 Demographic and baseline pulmonary functional data of 15 smokers and 15 non smokers. Values are means (±SD) [range], apart from gender.

	Smokers	Non smokers
Age (yrs)	47 (7) [31–58]	43 (8) [29–59]
Gender (M/F)	10/5	10/5
BMI (kg/m2)	25 (3) [22–30]	25 (4) [19–30]
FEV1 (% pred)	103 (10) [87–122]	115 (10) [103–137)
FEV1/SVC (%)	78 (6) [69–91)	80 (6) [71–91]
TLC (% pred)	105 (9) [93–119]	106 (11) [94–129]
TLCO (% pred)	79 (10) [65– 96]	101 (31) * [76–184]

* p < 0.05.