Table 3

Clinician Performance in 4 As Delivery and Patient Outcomes at Postintervention Assessment by Intervention Group

Parameter	OMSC				OMSC+

	Pre n = 540	Post n = 394	AOR (95% CI)^a	P Value^b	Pre n = 583	Post n = 473	AOR (95% CI)^a	P Value^b
4 As delivery
Ask	47.3	55.9	1.45 (1.10-1.92)	.009	46.8	65.7	2.40 (1.83-3.14)^c	<.001
Advise	38.1	48.1	1.63 (1.20-2.11)	.001	42.5	53.5	1.71 (1.31-2.24)	<.001
Assist	35.1	42.8	1.44 (1.09-1.91)	.011	33.3	53.9	2.62 (1.99-3.45)	<.001
Set quit date	12.4	12.1	1.03 (0.68-1.55)	.898	11.2	18.7	1.93 (1.33-2.79)	.001
Self-help	10.0	11.1	1.19 (0.77-1.84)	.444	10.8	19.4	2.05 (1.42-2.98)	.001
Discuss medications	25.5	26.9	1.11 (0.81-1.51)	.517	26.1	37.1	1.87 (1.41-2.50)	<.001
Prescribe medications	8.7	8.8	1.11 (0.68-1.80)	.670	9.1	12.2	1.47 (0.96-2.27)	.080
Arrange	12.2	13.4	1.10 (0.73-1.66)	.649	10.3	22.5	2.66 (1.84-3.84)	<.001
Patient-level outcomes
Quit attempts	29.0	30.0	1.01 (0.75-1.36)c	.934	27.8	35.0	1.41 (1.07-1.86)^c	.015
7-day point-prevalence abstinence (self-reported)	4.6	9.1	2.18 (1.25-3.82)^c	.006	6.0	6.5	1.13 (0.65-1.96)	.669
7-day point-prevalence abstinence (biochemically validated)	0.0	2.8	…	…	0.3	2.5	13.03 (1.65-102.84)^c	.015
6-month continuous abstinence	4.1	6.6	1.75 (0.92-3.30)	.086	4.0	4.8	1.30 (0.69-2.45)	.423

AOR = adjusted odds ratio; OMSC = Ottawa Model for Smoking Cessation; post = postassessment; pre = preassessment.
↵a Controlling for clinic-level variance between clusters, patient sex, patient education, and self-reported anxiety or depression; based on inclusion of 15 clinics unless otherwise indicated.
↵b P value based on Wald statistic.
↵c The estimated G matrix for clinic-level variance was not a definite positive, so clinic-level variance was not included in this model.