Sleep patterns in children with autistic spectrum disorders: a prospective cohort study.

Objective: To investigate longitudinal sleep patterns in children with autistic spectrum disorders (ASDs).

Study Design: Prospective longitudinal study using Avon Longitudinal Study of Parents and Children, an English cohort born in 1991-1992. Parental reports of sleep duration were collected by questionnaires at 8 time points from 6 months to 11 years.

Sleep patterns in children with ADHD: a population-based cohort study from birth to 11 years.

Associations between sleep duration and disturbance in infancy and early childhood and attention deficit hyperactivity disorder diagnoses were investigated. Data from the Avon Longitudinal Study of Parents and Children, a population-based prospective longitudinal birth-cohort study of children born in 1991-1992 in South-West England, were employed. Eight thousand, one hundred and ninety-five children were assessed using the Development and Well-Being Assessment.

Childhood sleep duration and associated demographic characteristics in an English cohort.

Study Objectives: To provide reference data on sleep duration throughout childhood and explore the demographic characteristics associated with sleep.

Design: Population-based prospective longitudinal birth-cohort study.

Setting: South-West England, children born in 1991-1992 and followed since birth.