Environment Modifies the Association Between Depression Symptoms and Smoking Among Adolescents.

The article discusses the effect of environmental factors to the association between depression symptoms and smoking among adolescents. It examines whether the prevalence of smoking in school influences the relationship between smoking and depression symptoms at the individual level. Using the 2003 Ontario Student Drug Use Survey, results showed that smoking was significantly associated with higher depression scores among female smokers but not among male smokers. It was also found that the effect of school-level smoking was strongly negative indicating that as smoking prevalence increases, the effect of smoking on depression scores decreases.