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Un-Na Kim 2 Articles
Factors Affecting the Downward Mobility of Psychiatric Patients: A Korean Study of National Health Insurance Beneficiaries
Un-Na Kim, Yeon-Yong Kim, Jin-Seok Lee
J Prev Med Public Health. 2016;49(1):53-60.   Published online December 22, 2015
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  • 104 Download
  • 10 Crossref
AbstractAbstract PDF
The purpose of this study is to examine the magnitude of and the factors associated with the downward mobility of first-episode psychiatric patients.
This study used the claims data from the Korean Health Insurance Review and Assessment Service. The study population included 19 293 first-episode psychiatric inpatients diagnosed with alcohol use disorder (International Classification of Diseases, 10th revision [ICD-10] code F10), schizophrenia and related disorders (ICD-10 codes F20-F29), and mood disorders (ICD-10 codes F30-F33) in the first half of 2005. This study included only National Health Insurance beneficiaries in 2005. The dependent variable was the occurrence of downward mobility, which was defined as a health insurance status change from National Health Insurance to Medical Aid. Logistic regression analysis was used to assess factors associated with downward drift of first-episode psychiatric patients.
About 10% of the study population who were National Health Insurance beneficiaries in 2005 became Medical Aid recipients in 2007. The logistic regression analysis showed that age, gender, primary diagnosis, type of hospital at first admission, regular use of outpatient clinic, and long-term hospitalization are significant predictors in determining downward drift in newly diagnosed psychiatric patients.
This research showed that the downward mobility of psychiatric patients is affected by long-term hospitalization and medical care utilization. The findings suggest that early intensive intervention might reduce long-term hospitalization and the downward mobility of psychiatric patients.


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The Effect of Sleep Duration on the Risk of Unintentional Injury in Korean Adults
Yeon-Yong Kim, Un-Na Kim, Jin-Seok Lee, Jong-Heon Park
J Prev Med Public Health. 2014;47(3):150-157.   Published online May 30, 2014
  • 11,412 View
  • 91 Download
  • 6 Crossref
AbstractAbstract PDF

The decrease or increase in sleep duration has recently been recognized as a risk factor for several diseases, including hypertension and obesity. Many studies have explored the relationship of decreased sleep durations and injuries, but few have examined the relationship between increased sleep duration and injury. The objective of this research is to identify the risk for injury associated with both decreased and increased sleep durations.


Data from the 2010 Community Health Survey were used in this study. We conducted logistic regression with average sleep duration as the independent variable, injury as a dependent variable, and controlling for age, sex, occupation, education, region (cities and provinces), smoking, alcohol use, body mass index, hypertension, diabetes, arthritis, and depression. Seven categories of sleep duration were established: ≤4, 5, 6, 7, 8, 9, and ≥10 hours.


Using 7 hours of sleep as the reference, the adjusted injury risk (odds ratio) for those sleeping a total of ≤4 h/d was 1.53; 1.28 for 5 hours, for 1.11 for 6 hours, 0.98 for 8 hours, 1.12 for 9 hours, and 1.48 for ≥10 hours. The difference in risk was statistically significant for each category except for the 8 and 9 hours. In this study, risk increased as the sleep duration decreased or increased, except for the 8 and 9 hours.


This research found that either a decrease or increase in sleep duration was associated with an increased risk for injury. The concept of proper sleep duration can be evaluated by its associated injury risk.



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    PLOS ONE.2016; 11(12): e0168202.     CrossRef
  • The Effect of Sleep Duration and Relief of Fatigue after Sleep on the Risk of Injury at School among Korean Adolescents
    Jungok Yu, Jungsoon Kim
    Journal of Korean Academy of Community Health Nursing.2015; 26(2): 100.     CrossRef

JPMPH : Journal of Preventive Medicine and Public Health