1. Objectifs

Intentions :
« Children with hyperactive symptoms are often referred to mental health services. Given the frequency and persistent nature of hyperactivity, it is important to better understand its developmental course. This study identified the different developmental trajectories of hyperactive symptoms from 2 to 7 years and tested early predictors of high-level and persistent hyperactivity. These data may lead to earlier detection of at-risk children and to more effective interventions that take into account developmental considerations. » (p. 2101)

2. Méthode

Échantillon/Matériau :
« Four data-collection cycles of a nationwide survey of Canadian children were used to track the early development of hyperactivity. Children were 0 to 23 months at the first cycle in 1994 and 6 to 7 years at the fourth cycle in 2000. » (p. 2101)

Instruments :
- Guide d’entretien;
- Center for Epidemiologic Studies Depression Scale (Radloff, 1977);
- Parent Practices Scale (Strayhorn & Weidman, 1988);
- McMaster Family Assessment Device (Byles, Byrne, Boyle & Offord., 1988);
- Infant Characteristics Questionnaire (Bates, Freeland & Lounsbury., 1979);
- Child Behavior Checklist (Achenbach, 1991).

Types de traitement des données :
Analyse statistique

3. Résumé

« Four trajectories of hyperactive symptoms were identified: very low, low, moderate, and high. Statistically significant predictors for high and persistent hyperactivity, after controlling for all other factors, were maternal prenatal smoking, child male gender, maternal depression, and hostile parenting. […] For the majority of children, the frequency of hyperactive symptoms decreased or remained low from 2 to 7 years. However, 7 children in 100 were classified as having high initial levels of hyperactive symptoms that persisted over time. Several prenatal and early postnatal risk factors identified these children, although additional variables will need to be identified to accurately predict high and persistent hyperactivity. Findings suggest that preventive interventions could target high-risk families during pregnancy and early childhood. » (p. 2101)