TABLE 2

Means, SDs, and Student's t Tests for Violent Behavior Over Time Based on Reported Head Injury at Wave 5

Wave 5Wave 6Wave 7Wave 8
MeanSDtdfMeanSDtdfMeanSDtdfMeanSDtdf
Head injury.43a.65−3.95568.30a.56−1.86512.23b.51−1.41466.32a.71−2.17459
No head injury.22.42.20.45.16.38.18.44
  • a P < .05.

  • b P = .08.