J Korean Neurol Assoc.  2018 Feb;36(1):1-8. 10.17340/jkna.2018.1.1.

Sleep Disorders Documented by Night Polysomnography in Patients with Chronic Insomnia Disorder

• Kang MR
• Choi SJ
• Joo EY

• KMID: 2435776
• DOI: http://doi.org/10.17340/jkna.2018.1.1

Abstract

BACKGROUND
To investigate the sleep disorders related to chronic insomnia and compare the characteristics of each group.
METHODS
We registered 191 patients (female 56.0%, age 61.7 years) who have complained about symptoms of insomnia for more than three months and assessed sleep disorders related chronic insomnia by analyzing their polysomnography (PSG) parameters, demographics, and questionnaires (Insomnia Severity Index, Beck Depression Inventory, Pittsburg Sleep Quality Index, and Epworth Sleepiness Scale, and World Health Organization Quality of Life Assessment Instrument abbreviated version).
RESULTS
Patients were categorized into groups of primary insomnia (PI, 51.8%, n=99), comorbid insomnia with obstructive sleep apnea (CIO, 38.7%, n=74), and comorbid insomnia with periodic limb movement disorder (CIP, 9.4%, n=18). CIO was older and more obese than PI and CIP. The proportion of males was the highest in CIO. Arousal index of PSG was higher in CIO and CIP than in PI. Other parameters and the results of questionnaires were not different among groups.
CONCLUSIONS
About a half of patients with chronic insomnia symptoms (48.2%) had considerable sleep disorders associated with insomnia. Our study suggests that the PSG as well as history taking and demographics are necessary to clarify the relevant conditions of chronic insomnia disorder for appropriate treatment.

Keyword

Chronic insomnia; Primary insomnia; Polysomnography; Obstructive sleep apnea

MeSH Terms

Arousal
Demography
Depression
Humans
Male
Nocturnal Myoclonus Syndrome
Polysomnography*
Quality of Life
Sleep Apnea, Obstructive
Sleep Initiation and Maintenance Disorders*
Sleep Wake Disorders*
World Health Organization