Background: Insomnia is frequent in the general population and is often related to a
psychiatric illness. However, little is known about how the chronicity of insomnia affects this …

Background: Chronic insomnia afflicts approximately 5–10% of the adult population in
Western industrialized countries. Insomnia may be secondary, ie triggered and/or …

Lack of a systematic assessment of insomnia has led to large variations in its reported
prevalence in the general population. This study aims to provide new guidelines to assess …

The association of three subtypes of insomnia with psychic and functional syndromes, and
the course of insomnia over 7 years were examined in a Swiss cohort of young adults …

Longitudinal studies observed that individuals suffering from insomnia disorder have a
higher vulnerability to develop symptoms of psychopathology compared with good sleepers …

Aim The prevalence of insomnia is influenced by environmental factors. This study aimed to
investigate the prevalence of insomnia and its sociodemographic and clinical correlates in a …

Method: Data of 2,619 individuals from the Netherlands Study of Depression and Anxiety
(NESDA) were analyzed. Psychopathology was classified as no, current, or remitted DSM-IV …

Epidemiological studies of insomnia in the general population have reported high
prevalence rates. However, few have applied diagnostic criteria from existing classification …

OBJECTIVE: The aim of the present study was to examine the association of insomnia
symptoms with demographic and physical and mental conditions in a large population …

Epidemiologic studies show that psychopathology is a very powerful risk factor for the
occurrence of insomnia. Depression and/or anxiety are quite prevalent among insomniacs …