ABSTRACT
The ICD-10 classification of behavioural and emotional disorders with onset usually occurring in childhood and adolescence is shown in Table 34.1.
EPIDEMIOLOGY
Preschool The main epidemiological study is the Waltham Forest Study (by Richman and colleagues) in the early 1970s of 3-year-olds, carried out in the London borough of that name. The Vineyard study (Martha) essentially confirmed its findings. The main findings included:
∑ 7% prevalence of moderate to severe behavioural and emotional problems, slightly greater in boys than girls
∑ 15% prevalence of mild behavioural and emotional problems ∑ strong associations found with:
∑ maternal depression ∑ poor parental marriage ∑ delayed development of language
∑ strong continuities of behaviour and language disorders over the early school years.
