Table 5 presents results of the ANOVA and post hoc comparisons between LCA class membership on current psychological functioning. There was a significant difference among classes on anxious/depressive problems (p = 0.035), a borderline significant difference on intrusive problems (p = 0.056) and a significant difference on substance use (p = 0.029). The post hoc test showed that participants of the early CPS/family investigation group reported significantly more anxious/depressive problems than participants of the early CPS/multiple investigation group (p = 0.022). Moreover, the early CPS/family investigation group reported more substance abuse than the late CPS interference without investigation group (borderline significant; p = 0.056).Table 5Results of ANOVA comparisons among classes on current self-reported psychological functioning and delinquent behaviour (N = 390)Class1 (N = 175)2 (N = 120)3 (N = 57)4 (N = 38)FpM (SD)M (SD)M (SD)M (SD)Psychological functioninga Total psychological problems61.4 (26.0)61.5 (25.8)59.8 (28.2)71.1 (22.8)1.710.164 Anxious/depressed69.2 (18)66.3 (16)69.4 (18)75.8 (18)2.88b 0.035** Withdrawn79.0 (17.2)78.1 (16.8)73.2 (18.7)80.8 (16.6)1.970.118 Somatic complaints68.1 (16.4)67.8 (16.1)69.2 (17.4)72.6 (16.7)0.900.439 Intrusive55.7 (1)59.3 (1)55.7 (1)57.8 (2)2.55c 0.056* Rule-breaking behaviour78.6 (16.8)79.9 (16.8)78.4 (16.2)82.6 (17.6)0.710.549 Aggressive behaviour67.7 (16.1)67.2 (15.5)68.5 (17)74.2 (16.9)1.970.118 Attention problems73.4 (14.3)74 (14.5)72.3 (14.5)77.7 (14.7)1.180.317 Thought problems74.3 (17.5)73.2 (16.3)72.1 (17.3)79.2 (16.5)1.520.208 Substance used 78.0 (18)81 (19)73.9 (19)83.9 (18)3.04e 0.029**Class 1 (N = 74) 2 (N = 59) 3 (N = 25) 4 (N = 21)FpM (SD)M (SD)M (SD)M (SD)Delinquency previous 6 months Total delinquency3.5 (8.1)7.1 (11.5)6.0 (13.2)2.2 (5.3)2.10.101 Destruction/public order offence0.09 (0.3)0.14 (0.4)0.00 (0)0.19 (0.4)1.890.133 Property offence0.22 (0.4)0.37 (0.5)0.27 (0.5)0.18 (0.4)1.720.165 Aggression/violent offence0.20 (0.4)0.27 (0.4)0.15 (0.4)0.23 (0.4)0.610.609 Drug offence0.57 (0.5)0.65 (0.5)0.54 (0.5)0.61 (0.5)1.350.261 aNormal functioning (score < 84), borderline range (score 84-90), clinical range (above 90)  bSignificant difference between early CPS/family investigation group and early CPS/multiple investigation group cSignificant difference between early CPS/multiple investigation group and late CPS/penal investigation group dClass 1; N = 174 eSignificant difference between early CPS/family investigation group and late CPS interference without investigation group* p < 0.10, ** p < 0.05, *** p < 0.01