Table 3. Changes in Cotinine-Confirmed Cessation and Practice-Level Smoking Prevalence at 2 Weeks and 2 Years After Intervention Implementation.
| Characteristic | 2 wk After Implementation | 2 y After Implementation | Risk Differences, % (95% CI) | P Value | ||
|---|---|---|---|---|---|---|
| Control | Intervention | Control | Intervention | |||
| Total parents screened, No. | 4615 | 3569 | 4611 | 5183 | NA | NA |
| Current smokers, No. (%) | 1103 (23.9) | 961 (27.1) | 1149 (25.0) | 1261 (24.4) | NA | NA |
| % Change in practice-level current smoking prevalence over 2 y | NA | NA | 1.1 | −2.7 | −3.7 (−6.3 to −1.2)a | .047 |
| Total individuals who currently smoke and formerly smoked who completed full survey, No.b | 936 | 1002 | 943 | 1007 | NA | NA |
| Cotinine-confirmed cessation, No. (%) | 135 (14.4) | 99 (9.8) | 106 (11.2) | 123 (12.2) | NA | NA |
| % Change in cessation over 2 y | NA | NA | −3.2 | 2.4 | 5.5 (1.4-9.6)a | .02 |
Abbreviation: NA, not applicable.
a
Group and time interaction, adjusting for state, parent age, sex, race, child age, and insurance status.
b
Former smoking was defined as reporting quitting in the past 2 years.