Table 3.

Trial 2: clinical effectiveness of the WATI, characteristics of active smokers registering from clinical practices^{a, b}

	Total		Control		Messaging		Personalized
	N	%	N	%	N	%	N	%
Patient Sex
Female	570	63	185	62	104	63	281	64
Male	330	37	114	38	60	37	156	36
Patient Age
19–34	152	17	47	16	27	16	78	18
35–55	454	50	155	52	77	47	222	51
55–64	224	25	71	24	48	29	105	24
65+	70	8	26	9	12	7	32	7
Patient race
White	769	85	253	85	144	88	372	85
Black or African American	87	10	33	11	14	9	40	9
Others	44	5	13	4	6	4	25	6
Patient education
Less than high school	75	8	24	8	15	9	36	8
High school graduate	270	30	88	30	41	25	141	33
Some college	380	43	139	47	71	44	170	39
College graduate or more	167	19	46	15	35	22	86	20
Readiness to quit c
Not thinking of quitting	34	4	13	4	4	2	17	4
Thinking of quitting	699	82	246	83	138	84	315	81
Set a quit date	117	14	39	13	22	13	56	14
Allow smoking at home
No	460	51	146	49	77	47	237	54
Yes	440	49	153	51	87	53	200	46
Number of cigarettes per day
0–10	241	27	84	28	42	26	115	26
11–20	460	51	149	50	81	49	230	53
>20	199	22	66	22	41	25	92	21
Visited other smoking cessation websites before
No	782	87	264	88	142	87	376	86
Yes	118	13	35	12	22	13	61	14
Quit attempt (1 day or more) in past 12 months
No	424	47	148	50	71	43	205	47
Yes	476	53	151	51	93	57	232	53

^a Nine hundred ninety patients registered, of whom only 900 were current smokers (see Fig. 3). ^b Characteristics were not significantly different between randomized groups (control, messaging, personalized). ^c Denominator 850 for this variable, as 50 patients did not complete status at initial registration