Change in physical activity after smoking cessation: The Coronary Artery Risk Development in Young Adults (CARDIA) study. To estimate physical activity trajectories for persons who quit smoking, and compare them to what would have been expected, had smoking continued. 5115 participants to the CARDIA Study, a population-based study of African American and European American people recruited at age 18-30 years in 1985/6 and followed over 25 years. Physical activity was self-reported during clinical examinations at years 0(1985/6),2,5,7,10,15,20 and 25(2010/11); smoking status was reported each year (at examinations or by phone, and imputed where missing). We used mixed linear models to estimate trajectories of physical activity under varying smoking conditions, with adjustment for participant characteristics and secular trends.
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