Dear Iliastolos:
The main objective of this is to see if the innominate bones move as hip ABD proceeds and if others get similar results to what I have seen. The cause appears rto be contralateral.
In the cases that I have used this test, the innominate bones move into anterior such that the ASIS is inferior to the PSIS on the right in the vast majority - over 90% of the cases with LBP.
The left is inconsistent: 60% move to posterior such that the ASIS is superior to the PSIS; 20% stay neutral that is near level for the PSIS to ASIS: the remaining ones have a slight anterior rotation , but usually less than the right side.
See what your expereinence is.
Best regards,
Neuromuscular.