Background The effect of insomnia and sleep duration on risk of anxiety has been assessed
based on traditional epidemiological studies. However, the inconsistent conclusions do not …

Background Insomnia is highly prevalent among patients with allergic disease and asthma;
however, few studies have investigated their causal relationship. We aim to explore the …

Background: Several observational studies have investigated the association of insomnia
with psychiatric disorders. Such studies yielded mixed results, and whether these …

Background The causal relationship between insomnia and migraine is contradictory and no
study has been carried out among the Chinese population to date. Methods In this case, we …

Abstract Study Objective Insomnia has been linked to acute and chronic pain conditions;
however, it is unclear whether such relationships are causal. Recently, a large number of …

Twin studies of insomnia exhibit heterogeneity in estimates of heritability. This heterogeneity
is likely because of sex differences, age of the sample, the reporter and the definition of …

Background Insomnia symptoms are widespread in the population and might have effects
on many chronic conditions and their risk factors but previous research has focused on …

Abstract Study Objectives: Insomnia is a highly prevalent sleep disorder yet little is known
about the role of genetic factors in its pathophysiology. The aim of this study was to examine …

Abstract Study Objectives: To examine the rates of family history of insomnia in a population-
based sample composed of self-defined good sleepers and individuals with insomnia and …

Aims Sleep disturbance is an important factor in the pathophysiology and progression of
psychiatric disorders, but whether it is a cause, or a downstream effect is still not clear …