title: An interpersonal continuity of care measure for Medicare Part B claims analyses.
abstract: OBJECTIVE
  This article presents an interpersonal continuity of care measure.
  
  
  METHODS
  We operationalized continuity of care as no more than an 8-month interval between any two visits during a 2-year period to either (a) the same primary care physician or (b) the same physician regardless of specialty. Sensitivity analyses evaluated two interval censoring algorithms and two alternative intervals. We linked Medicare Part A and B claims to baseline survey data for 4,596 respondents to the Survey on Asset and Health Dynamics Among the Oldest Old. We addressed the potential for selection bias by using propensity score methods, and we explored construct validity.
  
  
  RESULTS
  Interpersonal continuity with a primary care physician was 17.3%, and interpersonal continuity of care with any physician was 26.1%. Older participants; men; individuals who lived alone; people who had difficulty walking; and respondents with medical histories of arthritis, cancer, diabetes, heart conditions, hypertension, and stroke were most likely to have continuity. Individuals who had never married, were widowed, were working, or had low subjective life expectancy were least likely to have continuity.
  
  
  CONCLUSIONS
  Researchers can measure interpersonal continuity of care using Medicare Part B claims. Replication of these findings and further construct validation, however, are needed prior to widespread adoption of this method.
authors.affiliation: Iowa City Veterans Affairs Medical Center, Iowa, USA. fredric-wolinsky@uiowa.edu
authors.forename: Fredric D
authors.initials: FD
authors.lastname: Wolinsky
authors.forename: Thomas R
authors.initials: TR
authors.lastname: Miller
authors.forename: John F
authors.initials: JF
authors.lastname: Geweke
authors.forename: Elizabeth A
authors.initials: EA
authors.lastname: Chrischilles
authors.forename: Hyonggin
authors.initials: H
authors.lastname: An
authors.forename: Robert B
authors.initials: RB
authors.lastname: Wallace
authors.forename: Claire E
authors.initials: CE
authors.lastname: Pavlik
authors.forename: Kara B
authors.initials: KB
authors.lastname: Wright
authors.forename: Robert L
authors.initials: RL
authors.lastname: Ohsfeldt
authors.forename: Gary E
authors.initials: GE
authors.lastname: Rosenthal
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003266:Continuity of Patient Care; D004185:Disability Evaluation; D005260:Female; D006297:Health Services Accessibility / Q000706:statistics & numerical data*; D006306:Health Surveys; D006801:Humans; D007345:Insurance Claim Review; D008297:Male; D016345:Medicare Part B / Q000706:statistics & numerical data*; D051346:Mobility Limitation; D010817:Physician-Patient Relations; D011320:Primary Health Care; D014481:United States