Table 3.

C-indexes for different time intervals in the full sample (n = 127)

Parameter	Follow-up, months
	6	12	18	24	30
General offences
Group
Age and ethnicity	0.57	0.57	0.57	0.57	0.57
Delinquency and cannabis use	0.65	0.65	0.64	0.64	0.64
Behaviour	0.63	0.63	0.63	0.63	0.63
Neurobiology	0.65 0.65	0.65	0.65	0.64
Model
Age and ethnicity	0.57	0.57	0.57	0.57	0.57
Age and ethnicity + delinquency and cannabis use	0.68	0.67	0.67	0.67	0.67
Age and ethnicity + delinquency and cannabis use + behaviour	0.69	0.69	0.69	0.68	0.68
Age and ethnicity + delinquency and cannabis use + behaviour + neurobiology	0.74	0.73	0.73	0.72	0.72
Serious offences
Group
Age and ethnicity	0.60	0.60	0.60	0.60	0.60
Delinquency and cannabis use	0.69	0.69	0.69	0.69	0.68
Behaviour	0.64	0.64	0.64	0.64	0.64
Neurobiology	0.70	0.70	0.70	0.70	0.70
Model
Age and ethnicity	0.60	0.60	0.60	0.60	0.60
Age and ethnicity + delinquency and cannabis use	0.74	0.74	0.74	0.74	0.74
Age and ethnicity + delinquency and cannabis use + behaviour	0.76	0.76	0.76	0.75	0.75
Age and ethnicity + delinquency and cannabis use + behaviour + neurobiology	0.82	0.81	0.81	0.81	0.80