Depression moderates smoking behavior in response to a sad mood induction

Area of Science:

• Psychology
• Behavioral Science
• Addiction Research

Background:

• Stress and anxiety are known to elevate smoking motivation.
• Limited experimental data exists on the impact of depressed or sad mood on smoking behavior.
• Understanding mood-related smoking triggers is crucial for targeted interventions.

Purpose of the Study:

• To investigate the effects of induced sad mood versus neutral mood on smoking behavior.
• To examine depression scores as a moderator of mood's effect on smoking.
• To test mood changes as a mediator of the relationship between induced mood and smoking.

Main Methods:

• 121 adult smokers were randomly assigned to either a sad or neutral mood induction condition using film clips.
• Smoking behavior (latency, duration, puffs, expired carbon monoxide) and craving were measured.
• Depression scores were assessed to explore moderation, and mood changes were analyzed for mediation.

Main Results:

• Smokers with higher depression scores exhibited longer smoking duration and more puffs in the sad condition.
• A marginal interaction effect was found on expired air carbon monoxide in this subsample.
• No significant differences in smoking latency or craving were observed between conditions.

Conclusions:

• Induced sadness increases smoking behavior, particularly in individuals with higher depression scores.
• Decreases in positive mood partially mediated the effect of sad mood induction on smoking behavior.
• Findings suggest that reduced positive affect may disproportionately influence smoking in depression-prone individuals.