J Korean Sleep Res Soc.  2013 Jun;10(1):15-19.

Association between Sleep Quality and Non-Vertiginous Dizziness: A Hospital-Based Case-Control Study

Affiliations
  • 1Department of Neurology, Soonchunhyang University College of Medicine, Cheonan Hospital, Cheonan, Korea. neurofan@schmc.ac.kr
  • 2Department of Preventive Medicine, Soonchunhyang University College of Medicine, Cheonan Hospital, Cheonan, Korea.

Abstract


OBJECTIVES
Poor sleep quality can impair daytime function and evoke fatigue and excessive daytime sleepiness. Dizziness is one of the common subjective complaints and attributed to various medical and neuropsychological disorders. But influence of poor sleep quality on dizziness has not been fully studied. We hypothesized the patients with poor quality of sleep might feel non-vertiginous dizziness (NVD). The aim of this study is to investigate the association between sleep quality and development of NVD.
METHODS
We recruited 106 patients who had presented NVD in neurology department of Soonchunhyang University Cheonan Hospital from July 1st, 2009 to June 30th, 2010. They completed the following questionnaires: the Pittsburgh Sleep Quality Index (PSQI), the Insomnia Severity Index (ISI), the Fatigue Severity Index, the Epworth Sleepiness Scale, Sleep Apnea scale of the Sleep Disorders Questionnaire and Beck Depression Inventory (BDI). 116 dizziness-free controls were recruited via Health Screening Center and also completed the same questionnaires.
RESULTS
Patient with NVD had significantly higher PSQI and ISI score compared with the controls (PSQI: 7.7+/-4.4 vs. 5.4+/-2.6, p<0.001, ISI: 9.7+/-7.0 vs. 6.8+/-4.4, p<0.001). In multiple logistic regression analysis adjusted for age, sex, body mass index, and BDI, poor sleep quality was significantly associated with NVD. Fully adjusted odds ratio (OR) for NVD associated with 1 unit increase in PSQI was 1.15 [95% confidence interval (CI): 1.04-1.26]. Insomnia (ISI> or =15) was significantly associated with NVD (OR=4.43, 95% CI: 1.66-11.81).
CONCLUSIONS
This study suggests that the poor quality of sleep is associated with NVD.

Keyword

Dizziness; Sleep quality; Sleep disorders

MeSH Terms

Body Mass Index
Case-Control Studies*
Chungcheongnam-do
Depression
Dizziness*
Fatigue
Humans
Logistic Models
Mass Screening
Neurology
Odds Ratio
Surveys and Questionnaires
Sleep Apnea Syndromes
Sleep Wake Disorders
Sleep Initiation and Maintenance Disorders
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