Table 1: Sex comparisons of the means (SD) for the variables prosocial behavior, peer problems, ADHD, and ODD.
 GirlsBoyst
Teacher data    
 N 43414468 
 Prosocial behavior1.78 (.33)1.56 (.46)25.17*
 Peer problems.13 (.26).20 (.34)−9.85*
 ADHD.16 (.23).26 (.32)−14.72*
 ODD.08 (.20).20 (.37)−21.00*
Parent data    
 N 31263127 
 Prosocial behavior1.76 (.27)1.65 (.32)15.48*
 Peer problems.17 (.28).21 (.32)−4.95*
 ADHD.09 (.19).25 (.35)−26.56*
 ODD.22 (.29).29 (.36)−8.52*
*Statistically significant at α = 0.05.