Table 2.
Average Symptom Scores
| Symptom Type | M (SD) | Z | p | Cohen’s d | |
|---|---|---|---|---|---|
| Georgia Sample | Males | Females | |||
| Inattention | .95 (1.03) | .63 (.83) | 7.07 | <.001 | .34 |
| Hyperactivity-Impulsivity | .80 (.87) | .58 (.71) | 5.41 | <.001 | .28 |
| ODD | .98 (.86) | .83 (.80) | 3.64 | <.001 | .18 |
| CD | .05 (.12) | .02 (.10) | 5.87 | <.001 | .27 |
| Broad Externalizing | .16 (1.10) | −.16 (.87) | 6.70 | <.001 | .32 |
| Tennessee Sample | |||||
| Inattention | .84 (.66) | .61 (.53) | 11.52 | <.001 | .39 |
| Hyperactivity-Impulsivity | .66 (.58) | .50 (.48) | 9.10 | <.001 | .30 |
| ODD | .63 (.50) | .54 (.45) | 6.11 | <.001 | .20 |
| CD | .07 (.15) | .04 (.09) | 8.17 | <.001 | .26 |
| Broad Externalizing | .15 (.90) | −.14 (.70) | 10.77 | <.001 | .35 |
Notes: ODD = Oppositional Defiant Disorder; CD = Conduct Disorder; Z statistics reported for Mann-Whitney U tests of sex differences.