title: Decision Tree Identified Risk Groups with High Suicidal Ideation in South Korea: A Population-Based Study.
abstract: OBJECTIVE
  The aim of this study was to identify risk groups with high suicidal ideation among South Korean adults.
  
  
  METHODS
  A descriptive cross-sectional design was adopted using secondary data from the 2011 Korea National Health and Nutrition Examination Survey (KNHANES). A total of 5,963 adults aged 19 years and older who participated in the 2011 KNHANES served as participants.
  
  
  METHODS
  The prevalence of suicidal ideation and its related factors, including physical, psychological, health behavioral, and sociodemographic characteristics, were examined. Descriptive statistics and a decision tree were used for data analysis.
  
  
  RESULTS
  Nine groups with high suicidal ideation were identified. The coexistence of depression and high levels of stress increased the prevalence of suicidal ideation. The highest risk group was widowed or divorced adults with depression and high levels of stress, and 82.5% of these participants had suicidal ideation (the prevalence rate of this group was 5.7 times higher than the mean suicidal ideation prevalence rate in this study).
  
  
  CONCLUSIONS
  Public health nurses and community mental health professionals should recognize risk groups with high suicidal ideation, and target these groups when implementing preventive interventions.
authors.affiliation: College of Nursing, Chonbuk Research Institute of Nursing Science, Chonbuk National University, Jeonju-si, Korea.
authors.forename: Hyun Kyung
authors.initials: HK
authors.lastname: Kim
authors.affiliation: College of Nursing, Chonbuk Research Institute of Nursing Science, Chonbuk National University, Jeonju-si, Korea.
authors.forename: Ji Young
authors.initials: JY
authors.lastname: Kim
authors.affiliation: Anti-Corruption & Civil Rights Commission, Sejong, Korea.
authors.forename: Jong Hyen
authors.initials: JH
authors.lastname: Kim
authors.affiliation: College of Nursing, Jesus University, Jeonju-si, Korea.
authors.forename: Hee Kyoung
authors.initials: HK
authors.lastname: Hyoung
mesh_terms: D000328:Adult; D000368:Aged; D003430:Cross-Sectional Studies; D003663:Decision Trees; D003863:Depression / Q000453:epidemiology; D004243:Divorce / Q000523:psychology / Q000706:statistics & numerical data; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011637:Public Health Nursing; D056910:Republic of Korea / Q000453:epidemiology; D018570:Risk Assessment / Q000379:methods; D012307:Risk Factors; D012959:Socioeconomic Factors; D013315:Stress, Psychological / Q000453:epidemiology; D059020:Suicidal Ideation; D017805:Widowhood / Q000523:psychology / Q000706:statistics & numerical data; D055815:Young Adult
keywords: South Korean; adults; decision trees; suicidal ideation