Table 2

Effects of the intervention (after vs before) on monthly referral counts

Variable	OR	95% CI	Pr(>\|z\|)
Intercept: baseline	0.02	0.01 to 0.06	<0.001
Months after implementation of intervention, compared with before
First month	1.15	0.98 to 1.35	0.093
Second month	1.50	1.29 to 1.74	<0.001
Third month	2.14	1.87 to 2.45	<0.001
Fourth month and beyond	2.47	2.16 to 2.81	<0.001
Time since start of intervention, compared with before
Each additional month	1.06	0.99 to 1.13	0.103
Strategy for initial contact with smokers, compared with none
Appointment	1.78	1.116 to 2.84	<0.050
Early contact	6.21	3.183 to 12.11	<0.001
Month and availability of additional training, compared with month without training
Month of additional training	1.15	1.064 to 1.25	<0.001