Table 1

Sample characteristics overall and by message condition

Sample characteristics/conditions	Overall (%), N=1901	VLNC message (%), n=468	E-cigarette message (%), n=484	Combined message (%), n=476	Control (%), n=473
Sex
Male	46.6	45.5	45.9	45.6	49.3
Female	53.4	54.1	54.4	50.7	53.4
Age
18–29	28.9	27.4	29.1	28.2	31.1
30–44	23.2	22.4	22.7	23.9	23.7
45–59	23.4	25.4	23.1	22.3	22.8
60+	24.5	24.8	25.0	25.6	22.4
Race/ethnicity
White, non-Hispanic	69.0	70.1	64.9	73.1	67.9
Black, non-Hispanic	11.8	10.5	13.0	10.9	12.9
Other, non-Hispanic	3.7	4.3	3.9	2.3	4.4
Hispanic	11.5	11.8	13.0	9.7	11.4
2+ races, non-Hispanic	4.0	3.4	5.2	4.0	3.4
Education
No high school or GED	9.8	12.2	9.3	7.6	10.4
High school or GED	30.6	32.1	27.7	30.0	32.8
Some college or associate degree	35.3	31.8	38.6	36.8	34.0
Bachelor degree or higher	24.2	23.9	24.4	25.6	22.8
Employment status
Working full-time	43.6	41.9	44.0	44.7	43.8
Working part-time	16.6	17.9	17.8	15.8	15.0
Not working	39.8	40.2	38.2	39.5	41.2
Smoking status
Adults who smoked exclusively	51.1	52.6	50.6	51.5	49.7
Adults who dual used	24.8	24.4	24.6	24.8	25.6
Young adults who never smoked	24.1	23.1	24.8	23.7	24.7
Quit intention at pre-test*
Not in the next 6 months	65.1	63.1	64.9	69.1	63.2
Sometime in the next 6 months	34.9	36.9	35.1	30.9	36.8
E-cigarette use
Ever used	61.7	60.3	62.4	61.1	62.8
Never used	38.3	39.7	37.6	38.9	37.2

χ² test results suggest there were no significant differences in baseline characteristics between message conditions.
*Only tested among adults who smoked exclusively and adults who dual used (n=1443).
GED, General Educational Development; VLNC, very low nicotine cigarettes.