title: Assessing continuity of care in a community diabetes program: initial questionnaire development and validation.
abstract: OBJECTIVE
  To develop and validate a questionnaire based on agency theory to measure continuity of care in a community-based diabetes control program in Shanghai, China.
  
  
  METHODS
  Continuity of care was conceptualized in relation to two domains: information transfer and goal alignment. The questionnaire combined scales adopted from two validated questionnaires: the Primary Care Assessment Survey and the Summary of Diabetes Self-care Activities Measure. Patient interviews were conducted with 156 diabetes patients in the intervention group and 182 in the control group in two community health settings in Shanghai, China. The questionnaire was validated in terms of Likert-scaling assumptions, data completeness, score distribution, construct validity, and sensitivity.
  
  
  RESULTS
  All scales consistently showed strong measurement properties in item reliability and validity. Requirements of data completeness and distribution were achieved in all scales. Principal components analysis of six scales provided a satisfactory explanation of the hypothesized scale-domain construction.
  
  
  CONCLUSIONS
  The validation results suggested that the scales in our continuity of care questionnaire are consistent with the concept of continuity of care based on agency theory.
authors.affiliation: Nuffield Centre for International Health and Development, University of Leeds, 71-75 Clarendon Road, Leeds, West York, UK. xiaolin.wei@utoronto.ca
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Wei
authors.forename: Jan
authors.initials: J
authors.lastname: Barnsley
authors.forename: David
authors.initials: D
authors.lastname: Zakus
authors.forename: Rhonda
authors.initials: R
authors.lastname: Cockerill
authors.forename: Richard
authors.initials: R
authors.lastname: Glazier
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Sun
mesh_terms: D002681:China; D002908:Chronic Disease; D003266:Continuity of Patient Care / Q000592:standards*; D003920:Diabetes Mellitus / Q000453:epidemiology / Q000628:therapy*; D019538:Health Care Surveys; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D017060:Patient Satisfaction; D011320:Primary Health Care / Q000592:standards*; D011788:Quality of Life / Q000523:psychology; D012111:Residence Characteristics; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires / Q000592:standards*