title: Multivariate analysis of familial and non-familial influences for commonality in drug use.
abstract: A multivariate behavioral genetic analysis of common legal drug usage was performed on data from 238 Swedish families. By calculating cross-covariances between parents and offspring for pairs of traits, familial and non-familial correlations were computed to determine the extent to which pairs of measures share the same familial and non-familial influences. Factor analyses resulted in a 3- and a 2-factor solution for the familial and non-familial correlations, respectively. This suggests that familial and non-familial influences for drug usage are structured differently. If replicable, these results also suggest that the phenotypic structure reflects familial factors more than non-familial influences.
mesh_terms: D000328:Adult; D000428:Alcohol Drinking; D000434:Alcoholic Beverages; D003069:Coffee; D004777:Environment; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008957:Models, Genetic; D010641:Phenotype; D012907:Smoking; D013662:Tea
chemical_list: D003069:Coffee; D013662:Tea