Environmental Tobacco Smoke Exposure Reduction in High-Risk Preteens

BACKGROUND:

Parent counseling reduced children's ETS exposure in previous studies. This study will determine if interventions directed to preteens alone can reduce ETS exposure. The original pilot study showed that counseling reduced preteen's ETS exposure. New analyses showed that counseling reduced exposure to preteens in the NIH asthma study. A third pilot study showed that counseling plus feedback and incentives reduced preteens' ETS exposure. Based on these results, the number of counseling sessions were decreased to 10, inclusion criteria were liberalized, and recruitment sources were added to assure feasibility.

DESIGN NARRATIVE:

This study will determine the effect of combining counseling, feedback, and incentives on reducing second hand smoke (SHS) exposure and susceptibility to smoking among high-risk preteens. Two hundred youth aged 8 to 13 years old, including African American, Latino, Anglo, and other racial/ethnic groups, will be recruited. Preteens must be nonsmokers who are exposed to ETS in their home. Youth will be recruited sequentially and assigned to usual education or a combination of counseling, cotinine feedback, and contingent incentives. Outcome measures will be obtained prior to intervention, and at Months 5, 9, and 12. Preteens in the intervention condition will receive eight in-home counseling sessions and seven phone counseling sessions over a 5-month period. Urine samples will be analyzed for cotinine using highly sensitive (detection limit .05 ng/ml) and reliable procedures as employed by CDC (ID-LC/MS/MS). The same measures will be used for cotinine feedback for preteens in the intervention condition. Repeated measures analyses of differential exposure to ETS will be employed. Mixed effect regression (REML) and generalized estimating equations (GEE) models will be used for outcome analyses. Exploratory analyses will address questions about the environmental and social determinants of tobacco use and ETS exposure based on the researcher's Behavioral Ecological Model.

Primary objectives include the following: 1) to determine whether counseling plus cotinine feedback and incentives reduces ETS exposure more than does usual tobacco control education (measured by self-report ETS exposure by preteen and parent, and preteen urine cotinine at Month 5); and 2) to determine whether the experimental condition results in differential maintenance in ETS exposure-reduction compared to usual tobacco control education during follow-up (measured by self-report ETS exposure by preteen and parent, and preteen urine cotinine at Months 9 and 12).

Secondary objectives include the following: 1) to explore whether there is a differential rate of cigarette experimentation between groups; to explore whether there is a differential rate of experimentation with alcohol/drugs among groups; 2) to explore the differential level of tobacco use "susceptibility" among experimental groups; 3) to explore the degree to which youth avoid ETS exposure from family members and friends; and 4) to explore the multiple social and possible genetic factors that are independent and in combined association with ETS exposure and change in exposure (measured by preteen and parent self-report at Months 5, 9, and 12).