To the Editor: I would like to comment on the article by Cibulka and his colleagues in the September 1988 issue of Physical Therapy concerning changes in innominate tilt after manipulation of the sacroiliac joint. I am pleased to see more studies on the sacroiliac joint as a common source of low back pain. Certainly the authors took great care in their measurements of innominate tilt, but, in spite of this, the study overlooked some important biomechanics and may prove to be less informative than I hoped. The first clinical test used to evaluate the presence or absence of dysfunction of the sacroiliac joints was the standing flexion test. The indication for a positive test existed when one of the posterior superior iliac spines (PSISs) moved more cranially than the other.… [ ARTICLE][1] [1]: /lookup/volpage/68/1359?iss=9