Nordic Studies on Alcohol and Drugs, Ahead of Print.
Background and aims:Problematic internet use (PIU), and kindred concepts such as internet addiction (IA), make up a growing research field, partly due to the suggested inclusion of internet gaming disorder in a future DSM-6 as well as the fact that gaming disorder is on its way to being included in the ICD-11. Conclusions from research are far from unified. This study aims to synthesise the research field of problematic internet use/internet addiction/gaming disorder, with a focus on the reporting of prevalence and change.Methods:Longitudinal studies of PIU/IA formed the basis for a scoping review. Systematic searches of Web of Science, Scopus and Proquest, for peer-reviewed and published articles based on empirical data collected at a minimum of two time points for studies, and with an end point set at 2017, led to the inclusion of 97 studies. Endnote X7 was used to organise the results and NVivo 11 was used for synthesising the results.Results:Analyses focused on prevalence and change. Findings show variation among measures and prevalence as well as in reported outcomes relating to social life and other problems. Most studies reported relations between PIU/IA and other problems in life, but no specific time order could be established. Furthermore, many studies did not present data on prevalence or change even though using a longitudinal survey design.Discussion and conclusions:In summary, the research field is plagued by a lack of consensus and common understanding, regarding both measures, perceptions of the problem, and findings.