TABLE II.

Distribution of Participants in the Columbia County Longitudinal Study Who Were “High” or “Low” on Aggression in All Four Waves (Ages 8, 19, 30, and 48) for 230 Participants With Data at All Four Waves

	Number of participants who are LOW during all four waves	% of participants LOW at age 8 who are LOW during all four waves	Number of participants who are HIGH during all four waves	% of participants HIGH at age 8 who are HIGH during all four waves
HIGH and LOW defined by above or below total sample median for wave
All participants
141 children LOW at age 8	52	37%	–	–
89 children HIGH at age 8	–	–	31	35%
Females
80 children LOW at age 8	29	36%	–	–
38 children HIGH at age 8	–	–	7	18%
Males
61 children LOW at age 8	23	38%	–	–
51 children HIGH at age 8	–	–	24	47%
HIGH defined by above 66.6 percentile for wave, LOW defined by below 33.3 percentile for wave
All participants
99 children LOW at age 8	18	18%	–	–
46 children HIGH at age 8	–	–	10	22%

Note: The number of children categorized initially as LOW and HIGH at age 8 in this analysis is not the same because of greater attrition among the high-aggression participants. The data for the “triadic” categorization could not be computed by gender because the sample sizes would be too small.