Online Gambling: A Systematic Review of Risk and Protective Factors in the Adult Population.

In recent decades, internet gambling has seen strong growth and diffusion due to intrinsic characteristics that make it particularly attractive to players (accessibility, anonymity, variety of games). This paper aims to present the current state of knowledge of the risk and protective factors of online gambling. A literature search conducted in the PubMed, PsychInfo, and Scopus databases found 42 articles, which were included in the review. Methodological aspects and risk and protective factors were analysed cross-sectionally. The results concerning risk and protective factors were distinguished by the level of analysis: individual, relational, and contextual. Two types of comparisons were considered: online vs. offline gamblers and online nonproblematic vs. problematic gamblers. The results of the two comparisons were juxtaposed to analyse their consistency and the different associations with factors. In general, the review showed that risk factors and variables at the individual level are investigated to a greater extent, while protective factors at the relational and contextual level need more in-depth study in future research. More specifically, this review found that even if online and offline gamblers shared most risk and protective factors, there are variables that they would not have in common. These factors could be important to consider in preventive interventions aimed at online gamblers and online problematic gamblers.