There was a significant difference in the decline both in the average score and proportion of adolescents with Internet addiction in MFGT group at post-intervention ( MT1 = 3.40 , MT2 = 2.46 , p < 0.001 ; 100 versus 4.8 % , p < 0.001 ) maintained for three months ( MT3 = 2.06 , p < 0.001 ; 100 versus 11.1 % , p < 0.001 ) .