Knowledge about concurrent substance use and other risk behaviors - as well as their determinants - in the general population is insufficient.

To investigated socio-demographic, health status, and lifestyle determinants of habit-forming risk behaviors among French men and women.

We analyzed data collected in 2021–2022 from 32,622 participants (74.5% female; mean age=57.9±14.2 years) of the NutriNet-Santé web-cohort who had completed the Alcohol Use Disorders Identification Test, the 12-item Cigarette Dependence Scale, the modified Yale Food Addiction Scale 2.0, and the Internet Addiction Test. Using established cutoff values, participants were first split into 2 groups (Yes/No) for each risk behavior (alcohol use disorders, nicotine dependence, food addiction, and Internet addiction) and then placed into 3 groups (no risk behavior, 1 risk behavior (reference), and ≥2 risk behaviors) before fitting polytomous logistic regression models according to sex.

Younger age (Odds Ratio: ORmale=2.07; ORfemale=2.04), self-perceived poor health (ORmale=2.06; ORfemale=1.61), having obesity (OR=1.56; ORfemale=1.30), lack of affection during childhood (ORmale=1.56; ORfemale=1.39), and a lifetime prevalence or medication use for a mental disorder (ORmale=1.73; ORfemale=1.38) were significantly associated with having ≥2 versus 1 habit-forming risk behavior in both sexes (all p<0.05). Results for experiencing current financial difficulties (ORfemale=1.34), self-perceived poor dietary quality (ORfemale=3.23), being underweight (ORfemale=1.58) and overweight (ORfemale=1.30) were significant only in females (all p<0.05). The same factors plus current e-cigarette use (ORmale=0.54; ORfemale=0.77) in both sexes, having a higher educational attainment (ORfemale=0.75), being physically active at work (ORfemale=0.78) in females were inversely associated with having none versus 1 risk behavior (all p<0.05).

To our knowledge, this is the first study to explore determinants of concurrent habit-forming risk behaviors among men and women in a large, population-based study. The findings could serve as impetus for future research in this domain and ultimately help guide addiction prevention efforts.

None Declared