Table 1.

List of selected variables, specifying type and description.

N	Variable	Type_Variable	Type_Answer	Description
1	Age	Generic	Continued: 8–18 years old	Variable related to age
2	Gender	Generic	Dichotomous_Yes/No	Variable related to gender
3	Cluster	Generic	Dichotomous_Yes/No	Variable related to membership in the clinical group (daily recreational use of video games, more than 60 min) or control group (daily recreational use of video games, less than or equal to 60 min), including non-continuous
4	Time spent per day on recreational activities such as video games	Clinic	Continued_1–12 h	Variable related to the specific daily time (expressed in h/hour) spent on video game playing activity
5	Night game	Clinic	Dichotomous_Yes/No	Variable related to the time spent playing video game during nighttime hours that are usually devoted to sleep and rest
6	Solo game	Clinic	Dichotomous_Yes/No	Variable related (most of the time) to the performance of the video game as a playful activity in solitude rather than in company or sharing
7	Time taken away from study	Clinic	Dichotomous_Yes/No	Variable related to the time taken away from studying in favor of video games
8	Time taken away from friends	Clinic	Dichotomous_Yes/No	Variable related to the time taken away from friends in favor of video games
9	Time taken away from going out	Clinic	Dichotomous_Yes/No	Variable related to the time taken away from going out in public and attending events in favor of videogames
10	Time taken away from personal hygiene	Clinic	Dichotomous_Yes/No	Variable related to the time taken away from personal hygiene in favor of videogames
11	Time taken away from eating	Clinic	Dichotomous_Yes/No	Variable related to the time taken away from eating in favor of video games
12	Reason for addiction: absence of friends	Clinic	Dichotomous_Yes/No	Variable related to the reason for time spent on video game playing activity (absence of friends)
13	Reason for addiction: reduced interest in the outdoors	Clinic	Dichotomous_Yes/No	Variable related to the reason that justifies the time devoted to the video game playing activity (reduced interest in spending time outdoors, in public, or on group activities)
14	Reason justifying addiction: poor school performance	Clinic	Dichotomous_Yes/No	Variable related to the reason that justifies the time spent on video game playing activity (poor school performance)
15	Reason justifying addiction: emotional and family difficulties	Clinic	Dichotomous_Yes/No	Variable related to the reason for time spent on video games playing activity (emotional and family difficulties)
16	Alterations in life conduction as a result of video game-like activity	Clinic	Dichotomous_Yes/No	Variable related to the perceived negative effect on one’s lifestyle, resulting from the performance of playful activities with video games
17	Reinforcement of video game addiction in the pandemic	Clinic	Dichotomous_Yes/No	Variable related to the perceived temporal increase in playful activities with video games during and after the pandemic period
18	Use of lies	Clinic	Dichotomous_Yes/No	Variable related to telling lies during and after playing video games (e.g., to continuing to play or not taking specific responsibility)
19	Anger	Clinic	Dichotomous_Yes/No	Variable related to the expression of anger during and after the performance of playful activities with video games (e.g., to continuing playing or not taking specific responsibility)
20	Aggressiveness	Clinic	Dichotomous_Yes/No	Variable related to the display of aggressivity during and after the performance of playful activities with video games (e.g., continuing playing or not taking specific responsibility)
21	Subjective perception of benefits of using video games	Clinic	Dichotomous_Yes/No	Variable related to the subjective perception of possible benefits from performing playful activities with video games
22	Preferred game setting (violence)	Clinic	Dichotomous_Yes/No	Variable related to the preference for a certain video game types (violent type/non-violent type)
23	Use of video games in online mode	Clinic	Dichotomous_Yes/No	Variable related to the prevalence or not of using video games in on-line or off-line mode
24	Online encounters with individuals younger than the recommended age	Clinic	Dichotomous_Yes/No	Variable related to online meetings with individuals younger than the recommended age (e.g., 18 years old for violent games)
25	Witnessing others of deviant or criminal conduct	Clinic	Dichotomous_Yes/No	Variable related to having witnessed online deviant or criminal conduct by other users
26	Simulation or implementation of deviant or criminal conduct	Clinic	Dichotomous_Yes/No	Variable related to having witnessed or simulated online deviant or criminal conduct seen in video games