Incidence and Predictive Factors of New Onset Postoperative Sacroiliac Joint Pain After Posterior Lumbar Fusion Surgery for Degenerative Lumbar Disease.

LMM as the risk factor was included in our study because LMM showed a trend of rapid degeneration in the process of lumbar paraspinal muscle degeneration. 28 Generally degenerative grade of paraspinal muscle was evaluated by the high signal performance of paraspinal muscle on T2 MRI. 29 , 30 Our study evaluated LMM based on MRI T2 images and found that PSJP had more severe fatty infiltration.

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