. Author manuscript; available in PMC: 2013 Sep 1.

Published in final edited form as: Am J Health Behav. 2012 Sep;36(5):577–588. doi: 10.5993/AJHB.36.5.1

Table 2.

Differences in Demographics by Recruitment Method

	Online HRA	Off-line Promotions	Online Advertisements	Quit-Line Screening	P
N	397	1341	1426	189
Age (Mean in years)	22.5^a	25.1^b	25.3^b	25.1^b	<0.001
Sex: Female	67%^a	64%^ab	66%^a	55%^c	0.022
Race: Non-Hispanic White	78%^a	84%^b	85%^c	80%^abc	0.008
Education:
High school or less	23%^a	47%^b	47%^c	36%^b	<0.001
Some college or vocational education
College graduate or postgraduate	61%	40%	40%	49%
	16%	13%	13%	15%
Enrolled in college	83%^a	26%^b	23%^c	28%^c	<0.001
Employed outside home	68%^a	61%^b	62%^b	53%^c	0.002

Note. Statistically significant contrasts (P<.05) between groups indicated by different letters.