The Clinical Association between the Prevalence of Insomnia and Physical and Psychiatric Disorders in Two Areas of Gyeonggi Province of South Korea / 신경정신의학

ABSTRACT

OBJECTIVES: The purposes of this study are to examine the sociodemographic factors that increase the prevalence of insomnia, as well as to identify the relationship between the prevalence of insomnia and health conditions by navigating through the prevalence rates of insomnia in two different geographical regions with different socioeconomic structures. METHODS: A survey was conducted targeting 937 residents of Guri-si and Yangpyeong-gun in Gyeonggi Province, Korea. The Insomnia Severity Index was used to verify whether a respondent was experiencing insomnia. The Abbreviated Self-Rated Korean version of the Mini-International Neuropsychiatric Interview was used in diagnosis of mental diseases. Chi-square test was performed to determine the unique relationship between sociodemographic characteristics and the prevalence of insomnia. Multivariate logistic regression analysis was performed to examine the association of prevalence of insomnia with categorized relevant factors. RESULTS: The overall prevalence rate of insomnia for all respondents was 9.26%. The prevalence rate for Yangpyeong-gun was 11.75%, marking a significantly higher figure compared with the prevalence rate for Guri-si, which was 6.87%. Advanced age, female, other marital statuses than married, lower education, lower income, non-existence of private health insurance, and unemployment were risk factors for insomnia. The prevalence of insomnia showed strong association with physical and mental conditions, particularly with mental disorders, urologic diseases, and risk of injury from fall. CONCLUSION: The prevalence rates of insomnia in those two surveyed regions showed a meaningful difference even after controlling for sociodemographic characteristics. These findings suggest that such regional differences merits further attention and additional nationwide epidemiologic studies are needed.