Table 3.
Descriptive Statistics for Observed P300 Amplitude and Age by Each Assessment Occasion and Subgrouping of Participants by Paternal Externalizing and Participant Externalizing Disorder
| Paternal externalizing risk | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | Intermediate | Severe | All participants | |||||||||
| Assessment occasion and subgrouping | N | M | SD | N | M | SD | N | M | SD | N | M | SD |
| P300 amplitude (µV) | ||||||||||||
| Assessment 1 | ||||||||||||
| Offspring disorder absent | 58 | 28.62 | 8.27 | 28 | 25.95 | 8.27 | 6 | 30.04 | 8.29 | 92 | 27.90 | 8.29 |
| Offspring disorder present | 76 | 22.38 | 7.79 | 73 | 23.64 | 7.74 | 65 | 21.13 | 6.77 | 216 | 22.43 | 7.51 |
| Total | 134 | 25.08 | 8.55 | 101 | 24.28 | 7.92 | 71 | 21.88 | 7.29 | 306 | 24.08 | 8.14 |
| Assessment 2 | ||||||||||||
| Offspring disorder absent | 53 | 24.10 | 7.68 | 28 | 24.92 | 7.47 | 3 | 22.58 | 5.22 | 84 | 24.32 | 7.49 |
| Offspring disorder present | 58 | 21.66 | 6.45 | 61 | 21.38 | 7.78 | 44 | 18.93 | 5.96 | 163 | 20.82 | 6.92 |
| Total | 111 | 22.82 | 7.14 | 89 | 22.49 | 7.82 | 47 | 19.16 | 5.94 | 247 | 22.01 | 7.29 |
| Assessment 3 | ||||||||||||
| Offspring disorder absent | 46 | 21.73 | 5.92 | 22 | 22.93 | 7.30 | 5 | 26.50 | 3.47 | 73 | 22.41 | 6.29 |
| Offspring disorder present | 48 | 18.83 | 7.71 | 54 | 20.21 | 6.55 | 38 | 18.61 | 5.91 | 140 | 19.30 | 6.80 |
| Total | 94 | 20.25 | 7.00 | 78 | 21.00 | 6.84 | 43 | 19.53 | 6.20 | 213 | 20.37 | 6.78 |
| Age (years) | ||||||||||||
| Assessment 1 | ||||||||||||
| Offspring disorder absent | 58 | 17.45 | 0.42 | 28 | 17.45 | 0.43 | 6 | 17.26 | 0.49 | 92 | 17.44 | 0.43 |
| Offspring disorder present | 76 | 17.59 | 0.39 | 73 | 17.47 | 0.36 | 65 | 17.47 | 0.41 | 214 | 17.51 | 0.39 |
| Total | 134 | 17.53 | 0.41 | 101 | 17.47 | 0.38 | 71 | 17.46 | 0.41 | 306 | 17.49 | 0.40 |
| Assessment 2 | ||||||||||||
| Offspring disorder absent | 53 | 20.65 | 0.52 | 28 | 20.59 | 0.59 | 3 | 20.85 | 0.49 | 84 | 20.64 | 0.54 |
| Offspring disorder present | 58 | 20.72 | 0.41 | 61 | 20.55 | 0.47 | 44 | 20.57 | 0.52 | 163 | 20.61 | 0.52 |
| Total | 111 | 20.69 | 0.47 | 89 | 20.56 | 0.51 | 47 | 20.59 | 0.52 | 247 | 20.62 | 0.49 |
| Assessment 3 | ||||||||||||
| Offspring disorder absent | 46 | 23.83 | 0.73 | 22 | 24.03 | 0.76 | 5 | 24.33 | 1.14 | 73 | 23.92 | 0.77 |
| Offspring disorder present | 48 | 23.97 | 0.73 | 54 | 24.17 | 1.02 | 38 | 24.30 | 1.22 | 140 | 24.14 | 0.99 |
| Total | 94 | 23.90 | 0.73 | 76 | 24.13 | 0.95 | 43 | 24.30 | 1.20 | 213 | 24.06 | 0.93 |
Note. Paternal externalizing groups were low risk (no evidence of significant paternal substance misuse or antisociality), intermediate risk (paternal alcohol dependence but no paternal drug dependence or adult antisociality), and severe risk (significant paternal adult antisociality). Offspring disorders were attention deficit/hyperactivity disorder, oppositional defiant disorder, conduct disorder, adult antisocial behavior, alcohol abuse or dependence by age 20, drug abuse or dependence by age 20, and nicotine dependence by age 20.