title: Insomnia in sweden: a population-based survey.
abstract: Aims. Estimate the prevalence of insomnia and examine effects of sex, age, health problems, sleep duration, need for treatment, and usage of sleep medication. Methods. A sample of 1,550 subjects aged 18-84 years was selected for a telephone interview. The interview was completed by 1,128 subjects (72.8%). Results. 24.6% reported insomnia symptoms. Insomnia disorder, that is, insomnia symptoms and daytime consequences, was reported by 10.5%. The prevalence was similar among all age groups, with the exception of women aged 40-49 years who demonstrated a significantly higher prevalence, 21.6%. Having at least one physical or psychiatric disorder was reported by 82.8% of subjects with insomnia disorder. Mean sleep duration for subjects with insomnia disorder was 5.77 hours on weeknights and 7.03 hours on days off/weekends. The corresponding figures for subjects without insomnia disorder were 7.04 hours and 7.86 hours, respectively. Among those with insomnia disorder 62.5% expressed a need for treatment, and 20.0% used prescribed sleep medication regularly. Conclusions. Insomnia disorder is highly prevalent in the population. There are significant associations between insomnia disorder and physical and psychiatric disorders. A majority of subjects with insomnia disorder expressed a need for treatment, indicating a public health problem.
authors: Department of Neuroscience, Psychiatry, Uppsala University, SE-75185 Uppsala, Sweden.
authors: Lena
authors: 0000-0002-1612-349X
authors: L
authors: Mallon
authors: Department of Neuroscience, Psychiatry, Uppsala University, SE-75185 Uppsala, Sweden.
authors: Jan-Erik
authors: 0000-0001-9849-363X
authors: JE
authors: Broman
authors: Stress Research Institute, Stockholm University, SE-10691 Stockholm, Sweden.
authors: Torbjörn
authors: T
authors: Akerstedt
authors: Department of Clinical Neuroscience, Psychiatry, Karolinska Institutet, SE-14186 Stockholm, Sweden.
authors: Jerker
authors: J
authors: Hetta