Table 2.
Twin Intraclass Correlations for Trait Deviant Peers by Age and Gender
| Full Sample | Male | Female | |||||
|---|---|---|---|---|---|---|---|
| Mean Age |
MZ | DZ | MZ | DZ | MZ | DZ | |
| 15 | n | 418 | 228 | 207 | 96 | 211 | 132 |
| r | .64 | .60 | .65 | .54 | .60 | .65 | |
| 95% CI | (.58, .74) | (.51, .67) | (.56, .72) | (.38, .67) | (.51, .68) | (.54, .74) | |
| 18 | n | 372 | 204 | 181 | 91 | 191 | 113 |
| r | .73 | .57 | .73 | .57 | .68 | .51 | |
| 95% CI | (.68, .77) | (.46, .65) | (.65, .79) | (.41, .69) | (.59, .75) | (.36, .64) | |
| 21 | n | 381 | 214 | 185 | 87 | 196 | 127 |
| r | .62 | .43 | .59 | .33 | .60 | .420 | |
| 95% CI | (.56, .68) | (.31, .53) | (.49, .68) | (.12, .50) | (.50, .68) | (.27, .55) | |
Note. All correlations are significant at p < .001.