Harris T, et al. - Researchers investigated a sample of homeless adults (N=421) entering permanent supportive housing programs in Los Angeles to assess differences in correlates of tobacco use vs those of housed adults. They noted higher odds of daily tobacco use in correlation with lifetime diagnoses of schizophrenia, posttraumatic stress disorder, depression, bipolar disorder, and illicit substance use. A past 3-month tobacco cessation attempt was correlated with a lifetime diagnosis of depression; a lower likelihood of a cessation attempt was observed in correlation with illicit substance use. Findings thereby suggest that this sample of homeless adults differed from housed adults in terms of demographic and clinical characteristics associated with tobacco use. The primary correlates of tobacco use seemingly include mental health conditions and substance use among adults experiencing homelessness. Consideration should be given to these correlates in efforts aimed at improving cessation.