Differences between only children and children with 1 sibling referred to a psychiatric clinic: a test of Richards and Goodman's findings.

OBJECTIVE: To test Richards and Goodman's hypothesis that a higher proportion of only children under age 5 years assessed in a psychiatric department do not present a psychiatric diagnosis, compared with preschool children with 1 sibling, and to investigate other variables relative to children in this age group with no psychiatric disorder, in light of Richards and Goodman's findings. METHOD: We gathered data from 169 children under age 5 years seen in the psychiatric department of a large pediatric hospital in Montreal, Quebec. RESULTS: First, bivariate analysis showed no differences between the proportion of only children and children with 1 sibling regarding absence of a psychiatric diagnosis. Second, multivariate logistic regression analysis revealed that child's age and mother's child-rearing attitudes were significant variables. Younger children (that is, age 0 to 2 years) and children whose mothers had "adequate" child-rearing attitudes (that is, not exhibiting significant impatience, rejection, stubbornness, neglect, or overprotectiveness) were more likely to have no disorder. CONCLUSION: These findings run counter to Richards and Goodman's results and suggest that other variables, such as child's age and mother's behaviour, are significant predictors of children under age 5 years having no diagnosis.