Collected Dataset / QLSKC_Grade3

The population consisted of kindergarten boys and girls attending French-speaking public schools in the Canadian province of Quebec during the 1986-87 and 1987-88 school years. Two thousand children representative of the population and 1017 children exhibiting disruptive behaviour problems were included in the cohort.

Data on the participants were obtained via teacher and parent reports yearly from age 6 to 8 years. Self-administered questionnaires, such as The Social Behaviour Questionnaire were completed by both teacher and parent to assess the behaviour of the child. The emotional climate for the child and his/her temperament were assessed by the parent. Information concerning the child (perinatal information, sleep, life events during the previous year, school environment, puberty, etc.) or his/her family (socio-demographic information, general health, etc.) was also collected during this period.