Table 1.

Participants’ characteristics, n (%)

Characteristics	Total, n=660	Age 18–24 years, n=169	Age 25–49 years, n=242	Age 50+ years, n=249
Age, mean (SD)	42.0 (19.4)	22.2 (1.6)	32.1 (7.7)	65.0 (6.9)
Female	334 (51%)	90 (53%)	120 (49%)	124 (50%)
Race
White	532 (81%)	113 (67%)	191 (79%)	228 (92%)
Black	42 (6%)	14 (8%)	18 (7%)	10 (4%)
Asian-American	40 (6%)	20 (12%)	18 (7%)	2 (1%)
Other	46 (7%)	22 (13%)	15 (6%)	9 (4%)
Hispanic or Latino/Latina	94 (14%)	42 (25%)	45 (19%)	7 (3%)
College degree or higher	247 (37%)	37 (22%)	113 (47%)	97 (38%)
Overall health, very good or excellent	396 (60%)	110 (65%)	160 (66%)	126 (51%)
Annual household income
$0 to $29 999	149 (23%)	52 (31%)	51 (21%)	46 (18%)
$30 000 to $59 999	247 (37%)	75 (44%)	85 (35%)	87 (35%)
$60 000 to $89 999	156 (24%)	25 (15%)	73 (30%)	58 (23%)
$90 000 or more	106 (16%)	17 (10%)	33 (14%)	58 (23%)
Knowledge that quitting smoking with help is more successful than without	310 (47%)	75 (44%)	108 (45%)	127 (51%)
Used ENDS in last 30 days†	387 (64%)	109 (71%)	153 (69%)*	125 (54%)*
Used flavoured ENDS in last 30 days, of current ENDS users‡	296 (70%)	93 (79%)*	134 (79%)*	69 (52%)*
Anticipates ENDS use in next year	478 (72%)	121 (72%)	193 (80%)*	164 (66%)*
Ever used traditional tobacco products	607 (92%)	154 (91%)	221 (91%)	232 (93%)
Age at first cigarette, mean (SD)†	17 (6)	16 (3)	18 (5)	18 (8)
Smokes more than one pack/day§	54 (12%)	3 (3%)*	12 (8%)*	39 (23%)*
First smoke within 30 min of waking‡§	256 (59%)	48 (44%)*	89 (59%)	119 (70%)*
Tobacco quit attempt in past 12 months§	369 (85%)	87 (79%)*	130 (85%)	152 (89%)

*P<0.05; test versus total.

†n=607, 154, 221 and 232, respectively.

‡n=420, 117, 170 and 133, respectively.

§n=432, 110, 152 and 170, respectively.

ENDS, electronic nicotine delivery systems.