Table 1.
Descriptive Statistics
| Measure | n | Mean | SD | Skewness | Kurtosis | ||
|---|---|---|---|---|---|---|---|
| Statistic | SE | Statistic | SE | ||||
| T1 ADHD Overall | 223 | 31.51 | 9.469 | .162 | .163 | −.212 | .324 |
| T1 ADHD-I | 222 | 17.07 | 5.348 | .408 | .163 | −.063 | .325 |
| T1 ADHD-H | 223 | 14.35 | 5.374 | .130 | .163 | −.099 | .324 |
| T1 Dependent Stress | 221 | 14.00 | 8.619 | .808 | .164 | .201 | .326 |
| T1 Dependent Stress (sqrt) | 221 | 3.56 | 1.166 | .132 | .164 | −.547 | .326 |
| T1 Depression | 220 | 8.90 | 7.145 | 1.000 | .164 | .586 | .327 |
| T1 Depression (Sqrt) | 220 | 2.70 | 1.276 | −.026 | .164 | −.401 | .327 |
| T2 Dependent Stress | 217 | 3.19 | 2.54 | .991 | .165 | .302 | .329 |
| T2 Dependent Stress (sqrt) | 217 | 1.63 | .728 | .172 | .165 | −.549 | .329 |
| T3 Depression | 206 | 7.81 | 7.507 | 1.212 | .169 | .958 | .337 |
| T3 Depression (sqrt) | 206 | 2.38 | 1.470 | .036 | .169 | −.615 | .337 |
| Age | 224 | 19.33 | 1.280 | .704 | .163 | −.519 | .324 |
Note: ADHD-I, inattentive ADHD symptoms; ADHD-H, hyperactive/impulsive ADHD symptoms; T1, time-point 1; T2, time-point 2; T3, time-point 3. Sqrt; square-root transform was applied due to high skewness. The square-root transformed versions of the stress and depression variables were used for all subsequent analyses.