Scientists from the University of Oxford conducted a related study based on data from 4260 people collected between 2011 and 2015. About half of them had a history of mental illness.
Participants were asked to quit smoking for 9-24 weeks and then filled out questionnaires containing questions about mental health. Particular attention was paid to anxiety and depression, which were evaluated on a scale of 0 to 21.
Baseline showed a mean score of 4.25 for anxiety and 2.44 for depression. However, 24 weeks after quitting smoking, there was a noticeable improvement in symptoms.
Analysis of the data showed that smoking cessation was associated with a reduction in anxiety (0.4 points) and depression (0.47 points) levels compared with the continued smoking group, after adjusting for demographics and other factors.
Source: Ferra
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