title: Further validation of the 5-item Perceived Efficacy in Patient-Physician Interactions (PEPPI-5) scale in patients with osteoarthritis.
abstract: OBJECTIVE
  To examine the structural validity, internal consistency, test-retest reliability, and construct validity of the 5-item Perceived Efficacy in Patient-Physician Interactions (PEPPI-5) scale in patients with osteoarthritis (OA).
  
  
  METHODS
  A cross-sectional sample of 224 outpatients with OA completed a survey containing the Dutch PEPPI-5 and other standardized measures assessing perceived health-management skills, general self-efficacy, social support, and health-related quality of life. A subsample of 100 patients completed the PEPPI-5 again approximately 3 weeks later.
  
  
  RESULTS
  Confirmatory factor analysis demonstrated good fit for a unidimensional model of the PEPPI-5. Additionally, the scale showed high internal consistency (α=0.92) and fair test-retest reliability (ICC=0.68). As hypothesized, the PEPPI-5 was strongly correlated with perceived health-management skills, moderately with social support and psychosocial aspects of health, and not with physical aspects of health. Contrary to expectations, however, it was not correlated with general self-efficacy.
  
  
  CONCLUSIONS
  The Dutch PEPPI-5 demonstrated adequate validity and reliability in patients with OA.
  
  
  CONCLUSIONS
  The PEPPI-5 is a brief and appropriate tool for measuring self-efficacy of patients with OA to interact with their physicians. Additional research into its sensitivity to change is needed before it can be confidently recommended as an outcome measure in intervention studies.
authors: Department of Psychology, Health and Technology, University of Twente, Enschede, The Netherlands. P.M.tenKlooster@utwente.nl
authors: Peter M
authors: PM
authors: ten Klooster
authors: Johanna C M
authors: JC
authors: Oostveen
authors: Linda C
authors: LC
authors: Zandbelt
authors: Erik
authors: E
authors: Taal
authors: Constance H C
authors: CH
authors: Drossaert
authors: Etelka J
authors: EJ
authors: Harmsen
authors: Mart A F J
authors: MA
authors: van de Laar
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003430:Cross-Sectional Studies; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D008875:Middle Aged; D009426:Netherlands; D010003:Osteoarthritis / Q000523:psychology*; D010465:Perception; D010817:Physician-Patient Relations; D011581:Psychological Tests / Q000706:statistics & numerical data; D011594:Psychometrics / Q000706:statistics & numerical data*; D015203:Reproducibility of Results; D020377:Self Efficacy; D011795:Surveys and Questionnaires