title: [Analysis of the characteristics of the older adults with depression using data mining decision tree analysis].
abstract: OBJECTIVE
  The purpose of this study was to develop a prediction model for the characteristics of older adults with depression using the decision tree method.
  
  
  METHODS
  A large dataset from the 2008 Korean Elderly Survey was used and data of 14,970 elderly people were analyzed. Target variable was depression and 53 input variables were general characteristics, family & social relationship, economic status, health status, health behavior, functional status, leisure & social activity, quality of life, and living environment. Data were analyzed by decision tree analysis, a data mining technique using SPSS Window 19.0 and Clementine 12.0 programs.
  
  
  RESULTS
  The decision trees were classified into five different rules to define the characteristics of older adults with depression. Classification & Regression Tree (C&RT) showed the best prediction with an accuracy of 80.81% among data mining models. Factors in the rules were life satisfaction, nutritional status, daily activity difficulty due to pain, functional limitation for basic or instrumental daily activities, number of chronic diseases and daily activity difficulty due to disease.
  
  
  CONCLUSIONS
  The different rules classified by the decision tree model in this study should contribute as baseline data for discovering informative knowledge and developing interventions tailored to these individual characteristics.
authors.affiliation: College of Nursing, Chungnam National University, Daejeon, Korea. mhpark@cnu.ac.kr.
authors.forename: Myonghwa
authors.initials: M
authors.lastname: Park
authors.forename: Sora
authors.initials: S
authors.lastname: Choi
authors.forename: A Mi
authors.initials: AM
authors.lastname: Shin
authors.forename: Chul Hoi
authors.initials: CH
authors.lastname: Koo
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D000369:Aged, 80 and over; D002908:Chronic Disease; D057225:Data Mining; D003663:Decision Trees; D003863:Depression / Q000523:psychology*; D005260:Female; D015438:Health Behavior; D006304:Health Status; D006801:Humans; D007899:Leisure Activities; D008297:Male; D008875:Middle Aged; D011788:Quality of Life; D012959:Socioeconomic Factors
keywords: Aged; Data mining; Decision trees; Depression