Table a1 The serious and the violent delinquency scales

From: The VNTR 2 repeat in MAOA and delinquent behavior in adolescence and young adulthood: associations and MAOA promoter activity

1. In the past 12 months, how often did you hurt someone badly enough to need bandages or care from a doctor or nurse?a

2. In the past 12 months, how often did someone hurt you badly enough to need bandages or care from a doctor or nurse?a

3. In the past 12 months, how often did you use or threaten to use a weapon to get something from someone?a

4. In the past 12 months, how often did you take part in a fight where a group of your friends was against another group?a

5. In the last 12 months, how often did you deliberately damage property that did not belong to you?a

6. In the past 12 months, how often did you carry a handgun to school or work?a

7. In the past 12 months, how often did you steal something worth more than $50?a

8. In the past 12 months, how often did you steal something worth less than $50?a

9. In the past 12 months, how often did you go into a house or building to steal something?a

10. In the past 12 months, how often did you sell marijuana or other drugs?a

11. In the past 12 months, have you shot or stabbed someone?b

12. In the past 12 months, have you pulled a knife or gun on someone?b

  1. aFor this question, the score value on the scale is determined in the following manner: the score is coded as zero if the event did not occur in the past 12 months; the score is coded as one if the event occurred once or twice in the past 12 months; the score is coded as two if the event occurred three or four times in the past 12 months; the score is coded as three if the event occurred five or more times in the past 12 months.
  2. bFor this question, the score value on the scale is determined in the following manner: the score is coded as zero if the event did not occur in the past 12 months; the score is coded as three if the event did occur once or more during the past 12 months.
  3. In the construction of the serious delinquency scale, individuals with more than two missing responses were excluded from analysis. In the construction of the violent delinquency scale, individuals with more than one missing response were excluded from analysis.
  4. The violent scale is based upon 8 of the 12 items and they are items 1–6, 11, and 12.
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