Table 2.

Demographic characteristics and readiness to quit of smokers by recruitment source.

Demographic characteristic		Recruitment source, n (%)
		Google advertisement n=197	Dental practice referrals n=127	Medical practice referrals n=280
Sex
	Male	61 (31.0)	43 (33.9)	106 (37.9)
	Female	136 (69.0)	84 (66.1)	174 (62.1)
Age (years)
	19-34	29 (14.7)	40 (31.5)	47 (16.8)a
	35-54	105 (53.3)	59 (46.5)	143 (51.1)
	< 55	63 (32.0)	28 (22.1)	90 (32.1)
Race
	White	171 (86.8)	112 (88.2)	246 (87.9)
	Nonwhite	26 (13.2)	15 (11.8)	34 (12.1)
Highest grade of school
	< College graduate	134 (68.0)	91 (71.7)	236 (84.3)b
	College graduate	63 (32.0)	36 (28.4)	44 (15.7)
Smoking status
	Not thinking about quitting	6 (3.1)	11 (8.7)b	9 (3.2)b
	Thinking of quitting	112 (56.9)	92 (72.4)	209 (74.6)
	Set a quit date	29 (14.7)	13 (10.2)	30 (10.7)
	Already quit	50 (25.4)	11 (8.7)	32 (11.4)

^a P=.001 comparing Google and the applicable column

^b P<.001 comparing Google and the applicable column