Cluster of Laslett

Execution:

  1. Perform the Thigh Thrust and Distraction Test
  2. If both are positive: Diagnosis of SIJ Pain
  3. Continue if 0 or 1 tests are positive
  4. Perform the Compression Test: 2 tests positive? Diagnosis of SIJ Pain
  5. Continue if 0 or 1 tests are positive
  6. Perform the Sacral Thrust test

 

Outcome:

  • As soon as any 2 tests are positive: Diagnosis of SIJ Pain
  • If 1 out of 4 tests is positive: SIJ Pain unlikely
  • If 0 out of 4 tests is positive: Rule Out SIJ Pain
Study Reliability Sn Sp LR+ LR-
Laslett et al. (2005) for 2/4 positive tests NA 88 78 4.00 0.16
Comment: The Cluster of Laslett was slightly stricter in their criterias than the Cluster of van der Wurff (80% pain reduction with a joint block vs. 50%), which is why we prefer the Cluster of Laslett.