COVID-19 lockdown: The relationship between trait impulsivity and addictive behaviors in a large representative sample of Italian adults

Background: The importance of trait impulsivity in development, continuation and escalation of addictive behaviors has long been recognized. Methods: A cross-sectional population-based survey was conducted during the COVID-19 lockdown on 6003 Italian adults aged 18-74 years, representative of the Italian general population, to investigate the relationship between impulsivity (Barratt Impulsiveness Scale - BIS) and selected addictive behaviors (gambling habits, smoking status, cannabis use, average alcohol daily use). Results: A statistically significant relationship was found between motor impulsivity and starting/increasing drinking and increasing gambling (high vs. low motor impulsivity: multivariate odds ratio, OR=3.12; 95% confidence interval, CI: 1.45-6.74; p for trend=0.004 for start and OR=1.53; 95% CI: 1.26-1.86; p for trend<0.001 for increase drinking, respectively; OR=2.09; 95% CI: 1.41-3.12; p for trend<0.001 for increasing gambling). Limitations: Potential information and recall bias. The necessity to limit the length of the questionnaire not to reduce the quality of the answers of study participants. Conclusions: The multifaceted nature of impulsivity, potentially either cause or effect, hampers the understanding of its proper role in addictive behaviors. If confirmed by future longitudinal studies, our findings might support the planning, implementation and monitoring of evidence-based preventive interventions, to reduce addictive behaviors during public health emergencies.