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Other Names

The FADIR test, consists of flexion, adduction, and internal rotation that results in pain or clicking.[1]
The modified FADIR test[2]
  • Flexion-Adduction-Internal Rotation
  • FAIR Test
  • Piriformis Test
  • Flexion, internal rotation test
  • Anterior Impingement Test


  • Evaluate Piriformis muscle and other causes of hip pain


  • The patient can be either supine or laying on their side
  • Passively move their hip into 90° of flexion, while adducting and internally rotating
  • Positive test
    • Either pain along the piriformis distribution or sciatic nerve pain down the leg
  • Note the patient may also feel anterior thigh pain from hip pathology
  • Alternative approach is flexion, internal rotation without adduction

Modified FADIR

  • While performing, apply pressure over the piriformis muscle belly



Femoroacetabular Impingement or Acetabular Labral Tear

  • Reiman et al systematic review[3]
    • Sensitvity: 94-99%
    • DOR (diagnostic odds ratio): 5.71 - 7.82

See Also


  1. DisilVesTRO, KeVin, MaTThew Quinn, and RaMin R. TaBaDDOR. "A Clinician's Guide to Femoacetabular Impingement in Athletes." Rhode Island Medical Journal 103.7 (2020): 41-48.
  2. Kean Chen, Chee, and Abd J. Nizar. "Prevalence of piriformis syndrome in chronic low back pain patients. A clinical diagnosis with modified FAIR test." Pain Practice 13.4 (2013): 276-281.
  3. Reiman MP, Goode AP, Cook CE, et al. Diagnostic accuracy of clinical tests for the diagnosis of hip femoroacetabular impingement/labral tear: a systematic review with meta-analysis. Br J Sports Med. 2015;49:811–823.
Created by:
John Kiel on 9 July 2019 13:18:40
Last edited:
27 April 2023 21:01:33