Study finds, Preoperative factors associated with Low back p
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Spinal disorders and low back pain (LBP) have been associated with worse clinical outcomes of (THA). It is essential to identify spinal factors associated with post-THA LBP improvement. Researchers aimed to determine the proportion of patients with improved LBP after THA and to identify the preoperative spinal factors associated with LBP improvement.

151 patients who underwent primary THA were included and had a preoperative visual analogue scale (VAS) score for LBP of more than 2. The patients were classified into the LBP–improved or LBP–continued group based on a VAS score for LBP at 1 year after THA. Preoperative spinal parameters were compared between the two groups.

Results:
--95 patients were classified into the LBP–improved group.

--Among the coronal spinal parameters, the Cobb angle was significantly lower in the LBP–improved group. Among the sagittal spinal parameters, the LBP–continued group showed a significantly more posteriorly titled pelvis, lower lumbar lordosis (LL), greater sagittal vertical axis, and greater pelvic incidence minus LL mismatch, indicating a sagittal spinal imbalance.

--Logistic regression analysis found that preoperative factors associated with LBP improvement after THA were a low Cobb angle and high APP angle (anteriorly tilted pelvis).

Finally, 62.9% of patients with LBP before THA had better LBP. The main spine variables linked to persistent LBP were sagittal spinal imbalance and a high Cobb angle. These data imply that before performing THA on patients with LBP, hip surgeons should assess spinal alignment.

Source: https://www.sciencedirect.com/science/article/abs/pii/S088354032100677X?dgcid=rss_sd_all
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