Table 3 also shows that in general, the cross-trait cross-twin correlation between maltreatment and conduct problems in MZ twins is greater than that in DZ twins and full siblings. Therefore, although only a small portion of the variance in maltreatment appears to be associated with children’s genetic vulnerabilities, a portion of the covariance between maltreatment and conduct problems is due to common genetic factors. The MZ cross-trait correlation is similar in magnitude to the phenotypic correlation between maltreatment and conduct problems, suggesting a lack of common nonshared environmental influences between maltreatment and conduct problems.
