Table 3.

Thirty-Day Multiple Point Prevalence Abstinence Rates for the Designated Follow-up and All Preceding Intervals.

	Group			Between-Group Comparisons^a
Follow-Up	Bl	EI	EI+P	All	BI vs EI	BI vs EI+P	EI vs EI+P
3 mo
No. ^b	62	68	128	…	…	…	…
ITT,%	9.1	10.4	19.0	<.001	.42	<.001	<.001
Responders, %	11.6	13.6	25.9	<.001	.31	<.001	<.001
6 mo
No. ^b	45	48	84	…	…	…	…
ITT,%	6.6	7.4	12.4	<.001	.59	<.001	.002
Responders, %	9.4	11.0	19.8	<.001	.41	<.001	<.001
12 mo
No. ^b	31	31	64	…	…	…	…
ITT,%	4.6	4.8	9.5	<.001	.87	<.001	.004
Responders, %	7.3	7.9	17.2	<.001	.75	<.001	<.001
18 mo
No. ^b	24	29	52	…	…	…	…
ITT,%	3.5	4.5	7.7	.002	.39	.001	.02
Responders, %	6.2	8.2	15.0	<.001	.30	<.001	.005

Abbreviations: BI, basic Internet; EI, enhanced Internet; EI!P, enhanced Internet and telephone counseling; ellipses, not applicable; ITT, intent to treat.

P values are listed for omnibus test and pairwise comparisons.

Number of individuals per group who achieved 30-day point prevalence abstinence for the designated follow-up and all preceding intervals.