Table 1.

Description of the Risk Factors Measured in Grade 7

Continuous measures	No. of items in scale	Response options
Individual risk factors
Rebelliousness (e.g. “I do the opposite of what people tell me, just to get them mad”).	2	4 (definitely no to definitely yes)
Bullying victimization (“Have you been bullied recently (teased or called names, had rumors spread about you, been deliberately left out of things, threatened physically or actually hurt)?	1	4 (No; Yes, less than once a week; Yes, about once a week; Yes, most days)
Depressive symptoms (past month) Short Mood and Feelings Questionnaire 69 (e.g., “I found it hard to think properly or concentrate”)	3	Not true, Sometimes true, True
Family risk factors
Poor family management (e.g., “Would you parent know if you did not come home on time?”)	9	4 (definitely no to definitely yes)
Family conflict (e.g., “People in my family have serious arguments.”)	3	4 (definitely no to definitely yes)
Peer risk factor
Interaction with antisocial friends (e.g., “in the past 12 months, how many of your best friends have sold illegal drugs?”)	8	5 (None of my friends to 4 of my friends)
School protective factor
Opportunities for prosocial involvement (e.g., “In my school, students have lots of chances to help decide things like class activities and rules.”)	5	4 (definitely yes to definitely no)