Characteristics of Participating Practices
| Characteristic | Total No. | Interventin No. | Control No. | PValue |
|---|---|---|---|---|
| * χ2 test. | ||||
| † t test. | ||||
| Recruited, No. | 87 | 43 | 44 | |
| Location, No. | .69* | |||
| Southeast Michigan | 16 | 9 | 7 | |
| Mid-Michigan | 23 | 10 | 13 | |
| Southwest Michigan | 17 | 10 | 7 | |
| Northern Michigan | 31 | 14 | 17 | |
| Size of community, No. | .83* | |||
| <5,000 | 10 | 6 | 4 | |
| 5,000–10,000 | 7 | 3 | 4 | |
| 10,000–25,000 | 26 | 12 | 14 | |
| 25,000–100,000 | 23 | 10 | 13 | |
| >100,000 | 21 | 12 | 9 | |
| Proximity to major city, No. | .76* | |||
| Not within 25 miles | 29 | 15 | 14 | |
| Within 25 miles | 58 | 28 | 30 | |
| Practice type, No. | .72* | |||
| Solo | 13 | 6 | 7 | |
| 2-person | 16 | 6 | 10 | |
| Group practice | 37 | 20 | 17 | |
| Multispecialty group practice | 21 | 11 | 10 | |
| Patients aged >65 years, mean % (SD) | 24.7 (17.8) | 21.0 (15.4) | .34† | |
| Patients white, non-Hispanic, mean % (SD) | 78.0 (23.6) | 82.2 (19.0) | .38† | |
| Patients uninsured / Medicaid, mean % (SD) | 19.5 (18.4) | 23.3 (20.2) | .40† | |
| Estimated smoker visits per quarter, total No. | 22,163 | 23,537 | ||