A retrospective cohort study investigating lower back pain (LBP) in patients with cervical myelopathy undergoing surgery found that over 50% experienced improvement in postoperative numerical rating scales (NRS)-LBP, with 47% achieving the minimum clinically important difference (MCID), suggesting that treating cervical myelopathy may effectively alleviate concurrent LBP.
The aim of the present study is to investigate the coexisting lower back pain (LBP) in patients with cervical myelopathy and to evaluate changes in LBP after cervical spine surgery.
Only a few studies with a small number of participants have evaluated the association between cervical myelopathy surgery and postoperative improvement in LBP.
Patients who underwent primary cervical decompression surgery with or without fusion for myelopathy and completed preoperative and 1-year postoperative questionnaires were reviewed using a prospectively collected database involving 9 tertiary referral hospitals. The questionnaires included the patient-reported Japanese Orthopaedic Association (PRO-JOA) score and Numerical Rating Scales (NRS). The minimum clinically important difference (MCID) for NRS-LBP was defined as >30% improvement from baseline. Patient demographics, characteristics, and PRO-JOA score were compared between patients with and without concurrent LBP, and the contributor to achieving the MCID for LBP was analyzed using logistic regression analysis.
A total of 786 consecutive patients with cervical myelopathy were included, of which 525 (67%) presented with concurrent LBP. LBP was associated with a higher body mass index (P<0.001) and worse preoperative PRO-JOA score (P<0.001). Among the 525 patients with concurrent LBP, the mean postoperative NRS-LBP significantly improved from 4.5±2.4 to 3.4±2.7 (P50% were more likely to achieve MCID compared with those with a recovery rate <0% (adjusted odd ratio 4.02, P<0.001).
More than 50% of patients with myelopathy reported improvement in LBP after cervical spine surgery, and 47% achieved the MCID for LBP, which was positively correlated with a better PRO-JOA recovery rate. Treating cervical myelopathy in patients with concomitant LBP may be sufficient to mitigate concomitant LBP.
Level Ⅲ.
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