Table A3.
Within trait, cross-twin and cross trait, cross-twin correlations
| MZT | DZT | MZF | MZM | DZF | DZM | DZO | |
|---|---|---|---|---|---|---|---|
| NEUR | .25*** | .12** | .25*** | .24*** | .15* | .09 | .12* |
| NS | .38*** | .13** | .38*** | .40 | .15* | .15* | .09 |
| MDD | .34*** | .09 | .30*** | .60*** | .22 | .24 | −.10 |
| GAD | .32*** | .11 | .34** | .37* | .13 | .05 | .12 |
| SAD | .40*** | .16* | .47*** | .19 | .27** | .04 | .09 |
| ADHD | .33*** | .16** | .37*** | .32*** | .20 | .18* | .14 |
| ODD | .38*** | .14 | .35*** | .44*** | .23 | −.01 | .18 |
| CD | .49*** | .27*** | .55*** | .58*** | .40*** | .36*** | .23 |
| NEUR-NS | .09*** | .10 | .14** | .04*** | .16** | .07 | .08 |
| NEUR-MDD | .16** | .04 | .17** | .11 | .09 | .08 | −.05 |
| NEUR-GAD | .25*** | .09 | .28** | .18* | .18* | .08 | .01 |
| NEUR-SAD | .19*** | .10 | .23*** | .15** | .16* | .08 | .07 |
| NEUR-ADHD | .19*** | .12 | .22*** | .14** | .19** | .08 | .08 |
| NEUR-ODD | .17*** | .08 | .17** | .17** | .14 | .09 | .03 |
| NEUR-CD | .16*** | .12 | .23*** | .10* | .27*** | .07 | .03 |
| NS-GAD | .03 | −.04 | .04 | .01 | .00 | −.16 | −.01 |
| NS-SAD | .00 | .07 | .02 | −.03 | .14* | .06 | .03 |
| NS-ADHD | .18*** | .10 | .17*** | .21*** | .17* | .08 | .07 |
| NS-ODD | .14*** | .09 | .11* | .20*** | .11 | .18** | −.03 |
| NS-CD | .21*** | .11 | .26*** | .20*** | .14* | .12* | .08 |
| MDD-GAD | .23*** | .04 | .22** | .38** | .13 | .07 | −.01 |
| MDD-SAD | .20*** | .00 | .20** | .25* | .09 | −.11 | −.04 |
| MDD-ADHD | .20*** | .10 | .22** | .21 | .20* | .02 | .11 |
| MDD-ODD | .17** | .15 | .18* | .21 | .19* | .24 | .09 |
| MDD-CD | .19*** | .04 | .16* | .36*** | .18* | .13 | −.06 |
| GAD-SAD | .23*** | .06 | .22** | .27** | .12 | −.00 | .06 |
| GAD-ADHD | .21*** | .06 | .27*** | .14 | .19* | −.10 | .07 |
| GAD-ODD | .20** | .12 | .22** | .20 | .08 | .06 | .20* |
| GAD-CD | .07 | −.00 | .06 | .13 | .22** | −.02 | −.13 |
| SAD-ADHD | .16*** | .14 | .14* | .19** | .15* | .13 | .13 |
| SAD-ODD | .22*** | .10 | .25*** | .18* | .12 | .05 | .11 |
| SAD-CD | .14** | .08 | .22*** | .03 | .16 | .01 | .07 |
| ADHD-ODD | .26*** | .18 | .29*** | .23** | .25** | .16*** | .16* |
| ADHD-CD | .23*** | .12 | .19** | .31*** | .16* | .22*** | .02 |
| ODD-CD | .28*** | .15 | .22** | .40*** | .26* | .29*** | −.01*** |
Note. MZT = total monozygotic twin pairs; DZT = total dizygotic twin pairs; MZF= female monozygotic twin pairs; MZM= male monozygotic twin pairs; DZF= female dizygotic twin pairs; DZM= male dizygotic twin pairs; DZO= opposite sex dizygotic twin pairs; MDD = major depressive disorder; GAD = generalized anxiety disorder; SAD = separation anxiety disorder; CD = conduct disorder; ADHD = attention-deficit/hyperactivity disorder; ODD = oppositional defiant disorder; NS = novelty seeking; NEUR = neuroticism;
*
p<.05;
**
p<.01;
***
p< .001