Lifetime Depression, Other Mental Illness, and Smoking Cessation

Area of Science:

• Psychiatry
• Public Health
• Behavioral Science

Background:

• Lifetime mental illness (LMI) can affect smoking behaviors.
• Understanding the impact of LMI on smoking cessation is crucial for public health.
• Depression is a common LMI that may influence nicotine dependence and cessation outcomes.

Purpose of the Study:

• To investigate the relationship between lifetime mental illness (LMI) and smoking cessation.
• To specifically examine the impact of depression, particularly in combination with other LMIs, on cessation success.
• To evaluate the effect of multiple LMIs on smoking cessation outcomes at 7 months post-intervention.

Main Methods:

• Utilized data from a prior study, including LMI history, demographics, mood, and smoking cessation results.
• Analyzed the association between one or more LMIs and smoking cessation at 7 months.
• Assessed the specific impact of depression within the context of multiple LMIs on cessation rates.

Main Results:

• Individuals with 2 or more LMIs had significantly lower odds of smoking cessation (adjusted odds ratio [aOR] = 0.69, p = .037).
• Smokers with depression and 2+ LMIs had substantially lower odds of cessation (aOR = 0.34, p = .007) compared to those with multiple LMIs but no depression.
• Having one LMI, including depression, showed a trend towards reduced cessation odds (aOR = 0.74, p = .102).

Conclusions:

• Multiple lifetime mental illnesses (LMI) are associated with a higher risk of relapse among smokers attempting to quit.
• Depression, especially when co-occurring with other LMIs, presents a significant barrier to successful smoking cessation.
• These findings underscore the importance of addressing mental health conditions in smoking cessation interventions.