Trends in adult attitudes toward secondhand smoke in Indiana, 2002-2007: the impact of smoking status.

Purpose: As more research has been distributed through the media about the negative health impact of exposure to secondhand smoke (SHS), the public's support for smoke-free policies has increased. The purpose of this study was to evaluate trends in knowledge and attitudes about SHS exposure among Indiana adults by smoking status.

Methods: Study data were from four cross-sectional studies previously conducted by the Indiana Tobacco Prevention and Cessation Agency using the Adult Tobacco Survey protocol between the years 2002 and 2007.