To check for Leg Length Inequality (LLI), align the legs at the ankles. The therapist stands at the foot end of the table and grabs both ankles so that the therapist’s thumbs are distal to the medial malleoli.
Then through gentle pulling the legs can be equalized, preferably without disturbing the position of the pelvis. If there is LLI the pelvis might be drawn downwards on the side with the shorter leg. Check that the ASIS are on a line perpendicular to the side of the table.
The ankles are then brought together medially so the therapist can see on his thumbs which one is higher (towards client’s head not as in off the table), htis will reveal the shorter leg.
Check the levels of the ASISs in the horizontal plane. If one ASIS appears higher in the horizontal plane than the other (towards the client’s head and not off the table) this leg might be longer.
This test is not very exact. To get more accurate information on LLI an MRI has to be done.