Changes in Inhibition-Related Brain Function and Psychological Flexibility during Smoking Abstinence: A...

Area of Science:

• Neuroscience
• Psychology
• Addiction Science

Background:

• Smoking cessation attempts are frequent but often unsuccessful due to high relapse rates.
• Neuroimaging and psychological metrics show potential in predicting substance use phenotypes, including relapse.
• Previous research has not comparatively assessed changes in psychological processes versus brain activity for predicting smoking relapse.

Purpose of the Study:

• To compare the predictive power of changes in psychosocial variables against changes in task-based functional brain measures for nicotine relapse.
• To investigate the combined predictive ability of psychosocial and neuroimaging data for smoking cessation outcomes.
• To identify key factors that predict sustained abstinence from nicotine.

Main Methods:

• A longitudinal study design with 120 participants, measuring variables one day before and at 1 and 4 weeks post-cessation.
• Bioverified abstinence checks were conducted multiple times during the first month.
• A novel machine learning approach was employed to analyze psychosocial and functional brain imaging data (electrophysiology) to predict time to relapse up to 12 months.

Main Results:

• Increased electrophysiological brain activity during inhibitory control tasks predicted longer time to relapse (c-index=0.56).
• Enhanced psychological flexibility, particularly when experiencing negative smoking-related sensations during abstinence, predicted longer time to relapse (c-index=0.63).
• A combined model integrating psychosocial and brain data demonstrated superior predictive accuracy (c-index=0.68) and generalizability on a validation dataset (c-index=0.59).

Conclusions:

• Changes in psychological flexibility and inhibitory control brain function during abstinence are crucial predictors of smoking relapse.
• Monitoring and potentially augmenting these psychological and neural factors could enhance the success of smoking cessation interventions.
• The findings highlight the importance of a combined approach, integrating psychological and neurobiological markers, for predicting and supporting long-term nicotine abstinence.