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Table 2 Changes in meniscal extrusion during various positions (mm, 95% CI, p value)

From: Sonographic evaluation of the degree of medial meniscal extrusion during Thessaly test in healthy knees

  Supine Standing 5° flexion IR 5° flexion ER 20° flexion IR 20° flexion ER
Supine   0.5
(0.2–0.7)^
− 0.05
(− 0.27–0.38)
0.10
(− 0.38–0.18)
− 0.40
(0.05–0.72)
− 0.05
(− 0.27–0.36)
Standing    0.5
(0.2–0.8)*
0.4
(0.11–0.65)*
0.9
(0.53–1.21)*
0.53
(0.20–0.90)*
5° flexion IR     0.16
(− 0.16–0.48)
0.33
(0.01–0.65)*
0.01
(− 0.40–0.38)
5° flexion ER      0.49
(0.19–0.78)*
− 0.15
(− 0.43–0.13)
20° flexion IR       0.34
(0.04–0.63)^
20° flexion ER       
  1. ER external rotation, IR internal rotation
  2. Bold—Statistically significant
  3. ^Statistically significant increase in extrusion
  4. *Statistically significant decrease in extrusion