Several variables were obtained from the CPS records. All variables were divided into categories to perform the latent class analysis (LCA), as it is a condition for this analysis to use categorical variables. The variables Age of first CPS report, Type of investigation, Number of investigations, Child maltreatment, Age of onset of delinquent behaviour and Family supervision order were used as indicators to execute the LCA. Age of first CPS report in which date of the first CPS investigation was recoded into four categories: no report, below age 13, 13 or 14 years old, age 15 up to 18. The CPS records provided information on three types of investigations: offence investigation, protection investigation and truancy investigation. Type of investigation was recoded into a variable that contained five categories: no investigation, protection investigation, offence investigation, truancy investigation, several types of investigations. Number of CPS investigations was recoded into three categories: no investigation, one or two investigations, at least three investigations. Child maltreatment was extracted from the record when a professional ascertained child maltreatment (Yes/No). Domestic violence was observed and registered by a professional (Yes/No). The verdict of the court to impose a family supervision order was included in the record (Yes/No). Out-of-home placement was also included in the record in the verdict of the court (Yes/No). Age of onset of delinquent behaviour: the date of the first offence was registered based on the police report. Using this date combined with the date of birth, the age of first offence was computed. This variable was recoded into four categories: no offence, first offence below age thirteen, first offence between 13 and 14 years of age, and first offence at age 15 or older.