An experiment in reducing interobserver variability of the examination for joint tenderness. Academic Article uri icon

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  • This experiment was designed to test the feasibility of reducing interobserver variability of the joint examination by agreement on a standard examination. Six rheumatologists independently examined 6 patients with rheumatoid arthritis (RA) in predetermined order, before and after a standardization of examination techniques. Results of an analysis of variance showed a reduction of the percent of variability due to observers from 13.8%, before standardization, to 3.2% after standardization, and an improvement in the percent variability related to patient differences from 70.7%, before standardization, to 86.3% after standardization. Such a reduction in observer variability has a potential for allowing a reduction in sample sizes required for RA clinical trials.


  • Klinkhoff, AV
  • Bellamy, N
  • Bombardier, C
  • Carette, S
  • Chalmers, A
  • Esdaile, JM
  • Goldsmith, Charles Harry
  • Tugwell, P
  • Smythe, HA
  • Buchanan, WW

publication date

  • March 1988