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Sacroiliac Distraction Test

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Other Names

  • SIJ Distraction Test
  • Gapping Test
  • SIJ Compression/Distraction Test


Demonstration of the compression component applying a posterolateral force[1]
Demonstration of the distraction component applying a posteromedial force[2]


  • The patient is supine, examiner is at patients side
  • Compression Component:
    • With arms crossed, the examiner applies posterolateral pressure at both ASIS
    • This "gapping" pressure is applied bilaterally and simultaneously
  • Distraction Component:
    • The examiner then uncrosses arms and repeats the test on the iliac crest, applying a posteromedial force
  • Positive Test:
    • Pain



  • Compression:[3]
    • Sensitivity: 69%
    • Specificity: 69%
  • Distraction
    • Sensitivity: 60%
    • Specificity: 81%

See Also


  1. Image courtesy of Mylan Myers, DO, "Perspectives on the Sacroiliac Joint"
  2. Image courtesy of AAFP.org, "Sacroiliac Joint Dysfunction: Diagnosis and Treatment"
  3. Laslett M, Aprill CN, McDonald B, Young SB. Diagnosis of sacroiliac joint pain: validity of individual provocation tests and composites of tests. Man Ther. 2005 Aug;10(3):207-18. PubMed PMID: 16038856
Created by:
John Kiel on 10 August 2019 01:21:24
Last edited:
19 May 2023 19:44:50