Prevalence of Problem Gambling: A Meta-analysis of Recent Empirical Research (2016–2022)

Gambling is widely considered a socially acceptable form of recreation. However, for a small minority of individuals, it can become both addictive and problematic with severe adverse consequences. The aim of this systematic review and meta-analysis is to provide an overview of prevalence studies published between 2016 and the first quarter of 2022 and an updated estimate of problem gambling in the general adult population. A systematic review and a meta-analysis were carried out using academic databases, Internet, and governmental websites. Following this search and utilizing exclusion criteria, 23 studies on adult gambling prevalence were identified, distinguishing between moderate risk/at risk gambling and problem/pathological gambling. This study found a prevalence of moderate risk/at risk gambling to be 2.43% and of problem/pathological gambling to be 1.29% in the adult population. As difficult as it may be to compare studies due to different methodological procedures, cutoffs, and time frames, the present meta-analysis highlights the variations of prevalence across different countries, giving due consideration to the differences between levels of risk and severity. This work intends to provide a starting point for policymakers and academics to fill the gaps on gambling research—more specifically in some countries where the lack of research in this field is evident—and to study the effectiveness of policies implemented to mitigate gambling harm.