BMJ : British medical journal
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Review Meta Analysis
Change in mental health after smoking cessation: systematic review and meta-analysis.
To investigate change in mental health after smoking cessation compared with continuing to smoke. ⋯ Smoking cessation is associated with reduced depression, anxiety, and stress and improved positive mood and quality of life compared with continuing to smoke. The effect size seems as large for those with psychiatric disorders as those without. The effect sizes are equal or larger than those of antidepressant treatment for mood and anxiety disorders.