A comparison of two time intervals for test-retest reliability of health status instruments Academic Article Article uri icon


MeSH Major

  • Athletic Injuries
  • Elbow Joint
  • Joint Dislocations
  • Joint Instability
  • Range of Motion, Articular
  • Videotape Recording


  • Studies of test-retest reliability for health-related quality of life instruments have used varying intervals between test administrations. There is no evidence available to aid in the selection of the time interval between questionnaire administrations for a study of test-retest reliability for health status instruments. We compared the test-retest reliability at 2 days and 2 weeks for four knee-rating scales and the eight domains of the SF-36. Seventy patients with disorders of the knee who were in a stable state were randomly allocated to repeat the questionnaires at either 2 days or 2 weeks. There were no statistically significant differences in the test-retest reliability (intraclass correlation coefficient and limits of agreement statistics) for the two time intervals.

publication date

  • August 2003



  • Academic Article


Digital Object Identifier (DOI)

  • 10.1016/S0895-4356(03)00084-2

PubMed ID

  • 12954464

Additional Document Info

start page

  • 730

end page

  • 5


  • 56


  • 8