# Table 4 Prevalence of perceived problems and the participants’ distribution on the three indexes

Girls Boys
All girls n = 1069 5th grade n = 389 7th grade n = 397 9th grade n = 283 All boys n = 1031 5th grade n = 366 7th grade n = 378 9th grade n = 287
Computer gaming, % strongly + partly agree: % % % % % % % %
I think I spend way too much time playing computer games 13.5 19.8 12.6 6.0 25.9 24.6 24.9 28.9
I get in bad mood when I cannot spend time on computer games 5.6 6.7 5.3 4.6 11.4 11.5 10.8 12.2
My parents tell me, I spend way too much time on computer gaming 11.3 14.9 11.6 6.0 32.2 26.5 34.1 36.9
Index for problems related to computer gaming
0 79.1 71.2 79.9 88.7 56.4 59.3 55.8 53.3
1 13.2 18.8 12.3 6.7 21.6 22.1 22.8 19.5
2 6.1 7.5 6.3 3.9 18.1 15.3 17.2 23.0
3 1.7 2.6 1.5 0.7 3.9 3.3 4.2 4.2
Console-gaming, % strongly + partly agree:
I think I spend way too much time on console-gaming 3.7 6.9 2.3 1.4 10.0 11.2 9.8 8.7
I get in bad mood when I cannot spend time on console-gaming 2.4 3.3 2.0 1.8 6.5 7.4 5.0 7.3
My parents tell me, I spend way too much time on console-gaming 2.7 4.9 1.8 3.9 11.4 12.8 10.9 10.1
Index for problems related to console-gaming
0 94.4 90.5 96.0 97.5 82.3 80.9 82.3 84.0
1 3.5 5.9 2.5 1.4 10.0 9.8 11.4 8.4
2 1.0 1.5 1.0 0.4 5.4 6.3 4.8 5.2
3 1.1 2.1 0.5 0.7 2.3 3.0 1.6 2.4
Internet use, % strongly + partly agree:
I think I spend way too much time on internet communication and surfing 18.2 11.8 20.4 24.0 13.2 12.6 11.9 15.7
I get in bad mood when I cannot spend time on internet communication and surfing 13.8 7.2 16.4 19.1 8.3 4.9 9.3 11.5
My parents tell me, that I spend way too much time on internet communication and surfing 15.3 8.2 19.4 19.4 14.4 11.2 13.8 19.2
Index for problems related to Internet use
0 70.1 82.5 64.7 60.4 76.3 81.2 76.5 70.0
1 16.6 9.5 19.7 21.9 13.7 11.2 14.6 15.7
2 9.4 6.2 10.3 12.4 7.8 5.5 6.6 12.2
3 4.0 1.8 5.3 5.3 2.2 2.2 2.4 2.1