Table 1.
Monozygotic Twin Sample Sizes
| Age of female participants (years)
|
Age of male participants (years)
|
|||||
|---|---|---|---|---|---|---|
| Phenotype | 11 (n = 466) | 14 (n = 436) | 17 (n = 409) | 11 (n = 508) | 14 (n = 476) | 17 (n = 415) |
| Externalizing symptoms | ||||||
| Child report | 465 | 433 | 405 | 505 | 465 | 410 |
| Mother report | 466 | 425 | 382 | 506 | 470 | 405 |
| Combineda | 466 | 436 | 405 | 506 | 476 | 410 |
| Parent–child conflict | ||||||
| Child report | 445 | 422 | 362 | 452 | 431 | 380 |
| Mother report | 402 | 410 | 356 | 428 | 423 | 376 |
| Combineda | 451 | 435 | 409 | 461 | 466 | 415 |
a
Reflects the input of multiple informants (when available).