Median SF-36 general health scores, breathing difficulty “typically” scores, and breathing difficulty in the “past month” scores, among cigarette only users and dual users.

<p>Dual use was associated with lower (poorer) general health scores (ADJ <i>p</i> = .002) and higher (poorer) past month breathing difficulty scores (ADJ <i>p</i> = .001). Models adjusted for age, sex, race, education, cigarettes per day, coronary artery disease, congestive heart failure, and COPD. Error bars denote the interquartile range.