Toddler/child behaviour problems have received relatively Little previous a
ttention. Prior studies have implicated a wide variety of factors in the ae
tiology of child behaviour problems but many of these factors are correlate
d and little is known about their independent contributions. Four broad cat
egories of factors have been associated with child behaviour problems: (1)
maternal social and economic characteristics; (2) maternal lifestyle; (3) m
aternal mental state/child-rearing practices; and (4) maternal and child ph
ysical health. The study took a sample of 5296 families from the Mater-Univ
ersity of Queensland Study of Pregnancy (MUSP) for whom 5-year prospective
data are available. The major predictors of toddler behaviour problems were
the mother's and child's health, and the mother's mental state, The mother
's sociostructural characteristics and lifestyle made little or no addition
al contribution to the prediction models. It is, however, salutary to note
that the majority of children who are classified as having high levels of t
roublesome behaviour do not fall into any of the risk categories. A variety
of explanations and interpretations of the data is considered.