Table 1.
Descriptive Statistics for Study Variables
| Full Sample | Males | Females | Gender Difference | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| N | Mean | SD | N | Mean | SD | N | Mean | SD | t(df), p | |
| Time 1 | ||||||||||
| Age | 108 | 14.21 | 1.44 | 72 | 14.26 | 1.50 | 36 | 14.12 | 1.34 | .49(106), .63 |
| Inattentive Symptoms | 108 | 14.56 | 10.49 | 72 | 16.61 | 10.06 | 36 | 10.47 | 10.27 | 2.97(106), .004 |
| Hyperactive/Impulsive Symptoms | 108 | 11.47 | 9.68 | 72 | 13.57 | 9.94 | 36 | 7.28 | 7.68 | 3.33(106), .001 |
| Irritability | 108 | 4.59 | 4.27 | 72 | 5.03 | 4.19 | 36 | 3.72 | 4.35 | 1.51(106), .14 |
| Time 2 | ||||||||||
| Age | 80 | 15.61 | 1.48 | 48 | 15.69 | 1.55 | 32 | 15.49 | 1.39 | .56(78), .58 |
| Inattentive Symptoms | 80 | 11.63 | 9.42 | 48 | 13.35 | 9.70 | 32 | 9.03 | 8.48 | 2.051(78), .044 |
| Hyperactive/Impulsive Symptoms | 80 | 7.53 | 7.92 | 48 | 8.98 | 8.27 | 32 | 5.34 | 6.93 | 2.052(78), .044 |
| Irritability | 80 | 3.80 | 3.85 | 48 | 4.27 | 3.77 | 32 | 3.094 | 3.92 | 1.35(78), .18 |
Note. All measures are parent-reported. Inattentive, hyperactive/impulsive, and irritability symptoms all reported on the Conners 3 Rating Scale. Age reported in years.