Hyperactivity/inattention and self-esteem problems seem to be important for the development of IGD. We found first empirical evidence that IGD could prospectively contribute to a deterioration of adolescent mental health. Only a subgroup of affected adolescents showed IGD consistently over 1 year.

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Problematic gaming (PG) has been included in the DSM-5 and ICD-11. But, it is still controversially discussed, if problematic (online-) gaming is a subtype of problematic Internet use (PIU) or if both behavior patterns should be distinguished. In joint samples, the relationships between PIU and PG and correlates have so far only been investigated in cross-sectional studies. This is the first longitudinal study to determine predictors of PIU, PG, and a combined occurrence of PIU and PG (PIU + PG) together in one sample. Overall, 985 family dyads (one parent and her/his child) were interviewed twice (at t1 and t2, with one year in between) with a standardized questionnaire regarding PIU, PG and psychosocial aspects. Predictors for adolescent PIU, PG, and PIU + PG were determined with a multinomial logistic regression analysis. The following were our findings: (a) PIU (t2) was predicted by stronger emotional distress (t1) and PIU (t1); (b) PG (t2) by male gender, more self-esteem problems (t1), stronger hyperactivity/inattention (t1), and PG (t1); and (c) PIU + PG (t2) by male gender, stronger hyperactivity/inattention (t1), and PG (t1). Partly different patterns of predictors were observed for the development of PIU and PG. The results indicate not only commonalities but also differences in the etiology of these behavior patterns.

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