Table 2.
Behavioral and Parenting Characteristics of the 169 Children Included in Statistical Analyses by Genotype
| 9/9 | 9/10 | 10/10 | χ2 (df = 2) | |
|---|---|---|---|---|
| n = | 12 | 54 | 96 | |
| Child’s Behavioral Characteristics in Wave 1 | ||||
| Diagnosis of ADHD (%) | 58.3 | 59.3 | 46.9 | 2.34 |
| Number ADHD symptoms (mean, SD) | 8.8 (6.6) | 10.6 (6.0) | 8.3 (7.2) | 3.86 |
| Number CD symptoms (mean, SD) | 1.3 (2.1) | 1.3 (1.8) | 0.8 (1.4) | 4.15 |
| Child disruptive behavior during observation | 9.2 (11.1) | 14.1 (14.6) | 13.8 (16.0) | 1.06 |
| Maternal Parenting in Wave1 | ||||
| Positive parenting during observation | 13.4 (10.2) | 13.1 (9.6) | 12.5 (10.4) | 0.91 |
| Negative parenting during observation | 9.8 (10.4) | 12.5 (13.1) | 11.2 (9.6) | 0.81 |
| CD Symptoms During Outcome Waves | ||||
| Number CD symptoms in wave 6 (mean, SD) | 1.3 (1.5) | 0.9 (1.6) | 0.4 (1.0) | 7.30* |
| Number CD symptoms in wave 7 (mean, SD) | 1.0 (1.8) | 0.7 (1.2) | 0.4 (0.8) | 4.93 |
| Number CD symptoms in wave 8 (mean, SD) | 0.9 (1.2) | 0.4 (1.0) | 0.4 (0.7) | 3.31 |
| Number CD symptoms in wave 9 (mean, SD) | 0.8 (1.4) | 0.5 (1.1) | 0.5 (1.0) | 1.20 |
*
p < .05
Note: ADHD symptoms = number of symptoms reported by either the parent or the teacher; CD symptoms = number of symptoms reported in each assessment wave by either the parent or the youth (combined); comparisons of differences among the three genotype groups on binary variables were made using χ2; tests of differences among the groups on variables that were not dichotomous (family income and counts of CD symptoms in wave 1) were made using log-linear regression.