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Generalized estimating equation predicted means of secondhand smoke exposure outcomes by intervention group over time. (A) Reduction in air nicotine predicted means by intervention group over time. (B) Reduction in salivary cotinine predicted means by intervention group over time. (C) Predicted prevalence of home smoking bans (HSB) by intervention group over time. (D) Predicted prevalence of caregiver smoker status by intervention group over time. MI = motivational interviewing.
