Phenotypic correlations among the three forms of maltreatment ranged from .36 to .48, all of which were statistically significant at the p < .05 level. Table 3 shows cross-sibling, cross-trait correlations by type of sibling relationship. These correlations could not be calculated separately by gender because of the very small number of children who reported sexual maltreatment. Greater cross-sibling, cross-trait correlations among MZ twins than DZ twins and full siblings would suggest that the two variables are influenced by shared genetic factors. The observed correlations suggest that the associations between different forms of maltreatment generally are not due to common genetic factors.
