(b) The response is ABNORMAL (i.e. the test is
“positive”) if this cannot be done. This includes
responses where the pelvis is elevated on the non-stance
side above the stance side, but where this elevation is not
maximal.
(c) The response is also ABNORMAL if the pelvis can be lifted on command, but can not be maintained in
that position for 30 seconds. The time taken before the
pelvis starts to fall is recorded. By introducing a time element,
the Trendelenburg test can be objectively recorded
for comparison purposes. Obviously the response
described in (b) constitutes a zero time Trendelenburg
test