title: The interactive role of chronic medical conditions and sleep disturbance in predicting depressive symptoms among Korean American older adults.
abstract: OBJECTIVE
  This study examined the independent and interactive effects of chronic medical conditions and sleep disturbance on depressive symptomatology. The sample (N = 675) consisted of community-dwelling Korean American older adults, a group that has been found to be particularly high in depressive symptomatology.
  
  
  METHODS
  A hierarchical regression model of depressive symptoms was estimated with an array of predictors: (a) demographic variables, including immigration history, (b) chronic medical conditions, (c) sleep disturbance, and (d) an interaction between chronic medical conditions and sleep disturbance.
  
  
  RESULTS
  After controlling for the effects of demographic variables, both chronic medical conditions and sleep disturbance were identified as independent risk factors for depressive symptoms. Moreover, their interaction was significant, indicating that the coexistence of chronic medical conditions and sleep disturbance was significantly associated with higher levels of depressive symptoms (β = 0.15, p < 0.01).
  
  
  CONCLUSIONS
  Our findings call attention to sleep hygiene among older individuals with chronic medical conditions and recommend that sleep quality should be closely monitored and assessed by healthcare professionals.
authors.affiliation: Department of Aging and Mental Health Disparities, University of South Florida, Tampa, FL, USA. yjang@fmhi.usf.edu
authors.forename: Yuri
authors.initials: Y
authors.lastname: Jang
authors.forename: Jinah
authors.initials: J
authors.lastname: Shin
authors.forename: Soyeon
authors.initials: S
authors.lastname: Cho
authors.forename: Giyeon
authors.initials: G
authors.lastname: Kim
authors.forename: David A
authors.initials: DA
authors.lastname: Chiriboga
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001213:Asian / Q000523:psychology*; D002908:Chronic Disease / Q000208:ethnology* / Q000523:psychology*; D003866:Depressive Disorder / Q000208:ethnology* / Q000523:psychology*; D054242:Emigrants and Immigrants / Q000523:psychology*; D005260:Female; D005431:Florida; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D010555:Personality Inventory / Q000706:statistics & numerical data; D011594:Psychometrics; D007319:Sleep Initiation and Maintenance Disorders / Q000208:ethnology* / Q000523:psychology*