Table 2.
MZ twin pairs (n = 902) | DZ twin pairs (n = 480) | A | C | E | |
---|---|---|---|---|---|
|
|||||
Parent-Child Relationship Problems at age 18 | .57 (.52, .62) | .36 (.27, .45) | .43 (.25, .61) | .15 (.00, .31) | .42 (.38, .47) |
Externalizing at age 18 | .70 (.66, .73) | .42 (.34, .50) | .66 (.52, .75) | .07 (.00, .20) | .27 (.24, .31) |
Parent-Child Relationship Problems at age 25 | .46 (.40, .52) | .26 (.16, .35) | .38 (.17, .51) | .08 (.00, .27) | .54 (.49, .60) |
Externalizing at age 25 | .60 (.55, .64) | .31 (.23, .40) | .62 (.46, .66) | .00 (.00, .14) | .38 (.34, .42) |
NOTE: MZ = Monozygotic, DZ = dizygotic. A = Additive genetic variance, C = Shared environmental variance, E = Nonshared environmental variance. Ninety-five confidence intervals are shown in parentheses; the estimate is significantly different from zero if the interval does not cross zero.