Table 2.

Practice-Level Smoking Cessation Process Changes

	Intervention Practices			Control Practices
	Unique Patients and Visit Rates*			Unique Patients and Visit Rates
EBQI Period	Smoking Cessation Clinic	Primary Care Clinic	Smoking Cessation Attendance Rate†	Smoking Cessation Clinic	Primary Care Clinic	Smoking Cessation Attendance Rate*
Pre (1999)	1,214 (4.2 ± 3.8)	91,741 (3.0 ± 2.6)	55.6	1,582 (3.5 ± 3.0)	80,775 (2.6 ± 2.9)	76.8
Baseline (2000)	1,137 (4.4 ± 4.4)	85,274 (3.2 ± 2.8)	56.0	1,979 (3.2 ± 3.6)	100,830 (3.0 ± 3.1)	77.0
Post (2001)	1,926 (3.9 ± 3.3)	111,536 (3.4 ± 3.0)	72.6	1,993 (3.5 ± 3.8)	114,357 (2.9 ± 3.0)	68.3

^*Values represent the numbers of unique patients seen in smoking cessation clinics (using clinic stop code 707 from the VA Outpatient Clinic file) and the numbers of unique patients seen in primary care clinics (using clinic stop codes for 301 general medicine and 323 primary care), in addition to mean and SD visits among those patients, respectively.

^†Smoking cessation attendance rates were calculated as a function of the number of unique patients seen in smoking cessation clinics divided by the estimated number of smokers × 1,000 to arrive at smoking cessation attendance rates per 1,000 patients. We estimated the number of smokers by multiplying the number of primary care patients and the estimated prevalence of smoking obtained from the VA Office of Quality & Performance for intervention and control practices (238 and 255 per 1,000, respectively).