Osteoarthritic changes develop in SP with ageing. However, osteoarthritis in SP, was found to be clinically and radiologically different from that in other symphyseal joints, as SP hardly ever moves, and vertically processing interpubic disc combines pelvis girdle with counterforces, and is supported by very strong ligaments and muscles. Anterior and middle part of the SP joint is wider in women, because fibrocartilaginous disc is too thick to provide the mobility.
The correlation coeYcient between the posterior SP distances and age are expressed as follows:The results section of the abstract in the Wrst page third line:(r = ¡0.150; P < 0.001) In Table 2 r = ¡0.150, P < 0.001The online version of the original article can be found under
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