Appendix A.

Delinquency Classification Items

From Adolescent Interview
In the last 3 years, how many times did you:	N of Cases	Never (%)	Once (%)	Twice (%)	3–4 times (%)	5+ times (%)
Stay out later than your parents said you could?	702	16.1	9.8	15.8	19.4	38.9
Get into a serious fight with a student at school?	702	58.4	19.8	9.8	5.8	6.1
Run away from home?	700	86.9	6.3	2.9	2.3	1.7
Trespass?	702	71.8	13.0	7.1	4.1	4.0
Get something by threatening?	698	75.5	10.0	6.6	3.7	4.2
Argue or fight with your parents?	697	61.5	15.8	9.6	5.2	7.9
Hurt someone to the point they needed bandages and/or a doctor?	701	72.2	14.7	6.4	3.0	3.7
Damage school property on purpose?	698	77.8	12.2	3.7	2.4	3.9
Steal or shoplift from a store?	699	45.6	23.5	11.6	8.7	10.6
Hit a teacher?	699	76.0	12.2	6.4	2.3	3.1
Carry a weapon?	702	59.5	13.1	9.1	6.1	12.1
Take a non-family car without permission?	700	91.4	4.4	2.1	.4	1.6
Take part of a car without permission?	697	90.8	5.2	1.7	1.0	1.3
Participate in a gang fight?	701	70.2	13.1	7.1	4.1	5.4
Skip school with no real excuse?	702	39.6	19.8	13.0	12.1	15.5
Take something that did not belong to you?	701	50.2	25.0	9.4	7.7	7.7
Hit your father?	700	91.4	4.4	1.6	.6	2.0
Hit your mother?	701	91.6	4.0	2.4	.3	1.7

From Young Adult Interview
Before the age of 15, did you:	N of Cases	No (%)	Yes (%)
More than once, steal things from someone you knew?	949	80.4	19.6
Deliberately set a fire?	949	96.5	3.5
Deliberately destroy something by other than fire?	947	96.0	4.0
Physically hurt animals on a number of occasions?	951	97.0	3.0
Often start physical fights?	950	90.5	9.5
Use a weapon in a fight more than once?	950	95.1	4.9
Physically hurt other people a number of times?	950	94.6	5.4
Rob or mug someone?	951	98.4	1.6
Force someone to have sex?	949	99.7	.3