30 Table I. Comparison of the main features of arousal disorders, nightmares, and sleep-related seizures. REM, rapid eye movement *ln view of the wide range of types of epileptic seizures associated

with sleep, the descriptions given are no more than generalizations, … Conclusion Hopefully, this brief and highly selective account will have conveyed some of the special considerations and points of emphasis that are relevant to sleep disorders in children Inhibitors,research,lifescience,medical and adolescents. As much is already known but little is practised, it is to be hoped that awareness will increase about such developmental aspects which are important for both clinical work and BX 795 research in the field of sleep disturbance in young people.
According to the World Health Organization (WHO),1 mental health disorders are one of the leading causes of disability worldwide. Three of the ten leading causes of disability in people between the ages of 15 and 44 are mental disorders, and the other causes are often associated with mental disorders. Both retrospective Inhibitors,research,lifescience,medical and prospective research has shown that most adulthood mental disorders begin in childhood and adolescence.2 This highlights the importance of gaining understanding of the magnitude, risk factors, and

progression of mental disorders in youth. The aims of this review are: (i) to provide a background on the definition and goals of epidemiology Inhibitors,research,lifescience,medical and its contributions to our understanding of childhood mental disorders; (ii) Inhibitors,research,lifescience,medical to summarize the prevalence estimates of specific mental disorders in children; (iii) to describe the correlates and risk factors, and service patterns for childhood mental disorders

in community surveys; and (iv) to describe key issues and future directions in research on the epidemiology of mental disorders in children. Background: epidemiology Definition and goals Epidemiology is defined as the study of the distribution and determinants of diseases in human populations. Epidemiologic studies are concerned with the extent and types of illnesses in groups of people Inhibitors,research,lifescience,medical and with the factors that influence their distribution. Epidemiologists investigate the interactions that may occur among the host, agent, and environment (the classic epidemiologic triangle) to produce a disease state. The important goal of epidemiologic studies is to identify the etiology of oxyclozanide a disease in order to prevent or intervene in the progression of the disorder. To achieve this goal, epidemiologic studies generally proceed from studies that specify the prevalence and distribution of a disease within a population by person, place, and time (that is, descriptive epidemiology) to more focused studies of the determinants of disease in specific groups (that is, analytic epidemiology). Descriptive epidemiologic studies are important in specifying the rates and distribution of disorders in the general population.