title: Accuracy of Self-reported Hypertension, Diabetes, and Hypercholesterolemia: Analysis of a Representative Sample of Korean Older Adults.
abstract: OBJECTIVE
  This study will assess the accuracy of self-reported hypertension, diabetes, and hypercholesterolemia among Korean older adults.
  
  
  METHODS
  Using data from the fourth Korean National Health Examination and Nutrition Survey (KNHANES IV, 2007-2009), we selected 7,270 individuals aged 50 years and older who participated in both a health examination and a health interview survey. Self-reported prevalence of hypertension (HTN), diabetes mellitus (DM), and hypercholesterolemia was compared with measured data (arterial systolic/diastolic blood pressure, fasting glucose, and total cholesterol).
  
  
  RESULTS
  An agreement between self-reported and measured data was only moderate for hypercholesterolemia (κ, 0.48), even though it was high for HTN (κ, 0.72) and DM (κ, 0. 82). Sensitivity was low in hypercholesterolemia (46.7%), but high in HTN and DM (73% and 79.3%, respectively). Multiple analysis shows that predictors for sensitivity differed by disease. People with less education were more likely to exhibit lower sensitivity to HTN and hypercholesterolemia, and people living in rural areas were less sensitive to DM and hypercholesterolemia.
  
  
  CONCLUSIONS
  Caution is needed in interpreting the results of community studies using self-reported data on chronic diseases, especially hypercholesterolemia, among adults aged 50 years and older.
authors.affiliation: Department of Health Administration, Jungwon University, Chung-buk, Korea.
authors.forename: Heeran
authors.initials: H
authors.lastname: Chun
authors.affiliation: Social and Epidemiological Research, Centre for Addiction and Mental Health, Toronto, Canada; Department of Psychiatry, University of Toronto, Toronto, Canada.
authors.forename: Il-Ho
authors.initials: IH
authors.lastname: Kim
authors.affiliation: Institute of Health and Environment, Graduate School of Public Health, Seoul National University, Seoul, Korea.
authors.forename: Kyung-Duk
authors.initials: KD
authors.lastname: Min
keywords: cardiovascular disease risk factors; measured data; self-reported data; sensitivity; specificity; validity