Table 4.

SBN2 data, airway resistance (Raw), and special airway conductance (sGaw) pre- and post-use of an e-cigarette

	Nicotine=11mg				Nicotine=0mg
	COPD smokers (n=16)	Asthma smokers (n=11)	Smokers (n=28)	Non smokers (n=9)	Non smokers (n=12)
DN2/L, %pred
Pre	299±182	141±52	98±35	92±39	88±25
Post	316±185	172±65*	106±29	97±38	99±22
Raw, kPa L−1 sec−1
pre	0.43±0.18	0.38±0.13	0.29±0.12	0.25±0.07	0.24±0.04
Post	0.47±0.17	0.40±0.11*	0.31±0.13*	0.29±0.06*	0.32±0.08**
SGaw, sec−1 kPa−1
Pre	0.54±0.19	0.84±0.31	1.16±0.47	1.31±0.22	1.20±0.27
Post	0.52±0.19	0.80±0.33	1.03±0.40*	1.11±0.18*	0.95±0.18*

Values are expressed as mean ±SD, obtained in sitting positions

p values: Comparison of pre- and post- inhaling the content of an e-cigarette

^*p<0.05

^**p<0.001 ΔN2/L: Slope of phase III Raw: Airway resistance sGaw: Specific airway conductance %pred: percent of predicted