بررسي نشانگان متقاطع لگني در بيماران مبتلا به كمردرد مزمن غير اختصاصي

The Evaluation of Pelvic Cross Syndrome in Patients with Non-specific Chronic Low Back Pain

Objective: Th e purpose of thi s study was the inve stig ation of relationship between muscle imbalance syndrome in the lumbo-pelvic area (Pe lvic Cross Syndrome) which includes the combination of weakness of phasic muscle s and tightness of postural muscles, lordosis and chronic low back pain . Materials & Methods: This study was a comparative - crosssectio nal and case - co ntro l resear ch. A co nvenie nce sample o f 600 subjec ts partic ipated in this study. Th e size of lordosis, strength of abdominal and gluteal muscles and the ex tens ibility of iliopsoas and back ex tenso r mus cles were me asured in each gr oup. Th e best c ut-o ff values obt ain ed from Recei ver Operating Cha rac teri stic (ROC) c urve analysis were used to ca tegorize subjec ts as having wea k or tigh t muscl es in accordan ce with the assumption s. The lumbar lordosis in subj ec ts with and with out pattern s of muscl e imp airments, and the associ ation between lordosi s and low back pain was assessed . Data were analyzed by us ing s tatistical methods such as : ICC, Kolrn ogr off Smirnoff. Indep end ent T test and ANaYA. Results: Th e Findings of this s tudy showed no significant difference in the degree of lord osi s in subjects with and wi thout patt ern s of muscl e impairment in pelvic cross sy ndrome (P=0.38) and no sig nifica nt di fference in the lord osi s between subj ec ts with and without low back pain among those with spec ific pattern s of muscle impairment in pel vic cross sy ndrome (P=O.62). Data a lso showed no sig nific ant associat ion bet ween de gr ee of lordosis and low back pain (P=0.2 5). Conclusion: The findin gs o f thi s study did not support the Pel vic C ross Syndrome theory, whi ch indi cates certain patterns of muscl e impairment would lead to exagge rated LL and LBP. Ou r dat a show a rel ation ship between muscl e impairment and occ urre nce of LBP, but probahl y not via changing the degree of lumbar lordosis as it has been proposed in PCS theor y.