title: Agreement between self-reported and health insurance claims on utilization of health care: A population study.
abstract: OBJECTIVE
  To investigate the agreement between self-reported and insurance claim of the utilization of health care.
  
  
  METHODS
  Data were from the Taiwan National Health Interview Survey, conducted in 2001. There were 22,121 (94.2%) individuals who completed the interview, 18,143 of them aged 12 and above. Among them, 87% signed a consent form to allow us linking their interview with data with the National Health Insurance database. After deleting those with illegible identification code or date of birth, 15,660 subjects were included in the study. Kappa (kappa) was used to describe the visit concordance, whereas the intraclass correlation coefficient was used to describe frequency consistency. Logistic regression was used to investigate factors associated with the agreement.
  
  
  RESULTS
  All had reasonable visit and frequency agreements. Logistic regression showed that males and those living in rural areas tended to have a lower likelihood of agreement in reporting outpatient visits compared with others. In reporting emergency room visits, males and those with a higher education level, self-perceived health of "not good," chronic disease, or at least one difficulty with activities of daily living (ADL) had higher chances of agreement.
  
  
  CONCLUSIONS
  Agreement between self-reported utilization and insurance claims were fairly good in general population.
authors.affiliation: Center for Health Policy Research and Development, National Health Research Institutes, Zhunan, Miaoli County, Taiwan ROC.
authors.forename: Sheng-Tsung
authors.initials: ST
authors.lastname: Yu
authors.forename: Hsing-Yi
authors.initials: HY
authors.lastname: Chang
authors.forename: Ming-Chu
authors.initials: MC
authors.lastname: Lin
authors.forename: Yu-Hsuan
authors.initials: YH
authors.lastname: Lin
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006296:Health Services / Q000706:statistics & numerical data*; D006306:Health Surveys; D006801:Humans; D007348:Insurance, Health / Q000706:statistics & numerical data*; D008297:Male; D008498:Medical Record Linkage; D008875:Middle Aged; D012650:Self Disclosure; D012959:Socioeconomic Factors; D013624:Taiwan; D055815:Young Adult