A researcher at Case Western Reserve University School of Medicine recently discovered that addiction treatment results improved when teens in a residential program stopped smoking. The findings are published in the November issue of the Journal of Substance Abuse Treatment. The findings have important implications for success in treating addiction since up to three out of four people with such disorders are smokers, a significantly higher proportion than the overall national smoking rate of one out of every four Americans. Story about these findings was published in ScienceDaily . The study found that teens who stopped smoking benefited from lower cravings for alcohol and drugs, and did as well as their peers who smoked in terms of treatment duration, 12-step participation, and global functioning (a numeric scale used by mental health professionals to rate how well clients respond to various psychological and social situations and difficulties).