Table 3.

Characteristics of current and former smokers who used the e-cigarette daily, with or without nicotine, Internet, 2012-2013

	E-cig with nicotine	E-cig without nicotine	P value
Number of participants	766	30
Age (mean)	41.7	47.1	0.008
Men (%)	64.5	60.7	0.68
Former smokers (%)	83.2	80.0	0.75
In current smokers, cig./day (median)	4	15	0.10
In former smokers, time since quit smoking (days, median)	142	123	0.86
Duration of current episode of use (days, median)	152	91	0.48
Puffs per day on e-cigs (median)	170	90	<.001
Throat hit of current e-cig is “strong” (%)	42.0	13.7	<.001
Minutes to 1^st e-cig of the day, median	20	30	0.039
FTND-ecig	3.9	2.5	<.001
FTND e-cig score >=5	36.7	20.0	0.06
CDS-e-cig	33.2	27.8	0.017
NDSS-e-cig : Overall	−1.2	−1.5	0.12
NDSS-e-cig : Drive	−1.1	−1.7	0.019
NDSS-e-cig : Priority	−0.7	−0.7	0.98
NDSS-e-cig : Tolerance	−1.1	−0.8	0.09
NDSS-e-cig : Continuity	−0.9	−1.1	0.35
NDSS-e-cig : Stereotypy	−0.2	−0.4	0.29
Stopping using the e-cig would be “very difficult” + “impossible” (%)	28.2	14.8	0.010
Made a serious attempt to stop using e-cig in past 12 months (%)	1.5	7.4	0.018
Intention to stop using e-cig in next 6 months	8.2	30.9	0.002
If decided to stop e-cig, unlikely to succeed (%)	30.7	14.8	0.08
Feels the urge to smoke while vaping (%)	11.9	32.1	0.016
Easy to abstain from smoking when vaping (%)	89.6	79.3	0.019
Reasons for use (% very + extremely true)
Because I am addicted to the e-cig	8.4	0	0.13
To deal with my cravings for cigarettes	64.7	59.3	0.88
To quit smoking or avoid relapsing	81.8	79.3	0.53
Because I enjoy it	55.4	35.7	0.002
Reasons for NOT stopping e-cigarette (% agree)
I am a prisoner of the e-cig	26.9	18.5	0.07
I am unable to stop vaping	27.5	14.8	0.10

Bold: statistically significant values after Holm-Bonferroni adjustment.