Table 1 .

Participant Characteristics^a

	Completers	Noncompleters	PATH Wave 1
	n = 59	n = 50	n = 132
Demographics
Age	32 (10)	32 (10)	34
% Men	81	78	56
% >High school	75	76	62
% Unemployed	14	24	24
% White	77	69	81
E-cigarette use
Duration (months)	26 (17)	19 (16)**
% Started e-cigs after quit smoking	53	54
% Stated unable to stop using e-cigs	7	8
Current addiction to e-cigs (0–10)	6.6 (1.9)	7.0 (1.8)
% Ever stopped e-cigs ≥3 days	36	24
Among those who stopped,
% with ≥4 of 7 DSM-5 withdrawal symptoms	5	8
Tobacco cigarette use
Former daily smokers	92%	96%	95%
Age started smoking tobacco regularly	18 (3)	18 (5)
Cigs/day when smoked	15 (11)	14 (7)	19
FTCD	4.0 (2.6)	4.2 (2.2)
Among those who stopped
% with ≥4 of 7 DSM-5 withdrawal symptoms	29	36
Addiction to tobacco cigs when last smoked (0–10)	7.8 (2.1)	8.4 (2.0)

DSM-5 = Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition; FTCD = Fagerstrom Test for Cigarette Dependence; PATH = Population Assessment of Tobacco and Health.

^aAll data are means (standard deviation in parentheses) unless indicated otherwise.

**p < .05.