Nicotine delivery, tolerability and reduction of smoking urge in smokers following short-term use of one brand of electronic cigarettes

Table 2 Product use summary

	Controlled Use Period		Ad Lib Use Period
E-Cigarette	Puffs	Pre-to-Post Use Weight Difference (g)	Puffs	Pre-to-Post Use Weight Difference (g)
2.4 % nic + Gly	50.0 (50–51)	0.2251 ± 0.0408	52.3 (5–128)	0.1467 ± 0.0843
N = 23	50.0 (50–51)	0.2251 ± 0.0408	52.3 (5–128)	0.1467 ± 0.0843
2.4 % nic + Gly/PG	50.0 (50–51)	0.2349 ± 0.0633	55.4 (4–136)	0.1445 ± 0.0880
N = 23	50.0 (50–51)	0.2349 ± 0.0633	55.4 (4–136)	0.1445 ± 0.0880
2.4 % nic + Gly + menthol	50.0 (50–51)	0.2421 ± 0.0477	58.0 (8–140)	0.1604 ± 0.0827
N = 23	50.0 (50–51)	0.2421 ± 0.0477	58.0 (8–140)	0.1604 ± 0.0827
1.6 % nic + Gly	50.0 (50–51)	0.2238 ± 0.0399	60.3 (8–112)	0.1738 ± 0.0937
N = 23	50.0 (50–51)	0.2238 ± 0.0399	60.3 (8–112)	0.1738 ± 0.0937
1.6 % nic + Gly/PG	50.0 (50–51)	0.2570 ± 0.0433	49.5 (3–118)	0.1194 ± 0.0675
N = 23	50.0 (50–51)	0.2570 ± 0.0433	49.5 (3–118)	0.1194 ± 0.0675
	Puffs	Cigarettes Smoked	Puffs	Cigarettes Smoked
Tobacco Cigarette	10.5 (9–13)	1.0 (NA)	38.6 (16–103)	3.6 (2–7)
N = 24	10.5 (9–13)	1.0 (NA)	38.6 (16–103)	3.6 (2–7)

Values for puff count and cigarettes smoked are presented as mean (range). Values for the pre-to-post weight differences are presented as mean ± SD
nic nicotine, Gly glycerine, PG propylene glycol

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