4.5 Article

Back pain is also improved by lumbar disc herniation surgery

Journal

ACTA ORTHOPAEDICA
Volume 92, Issue 1, Pages 4-8

Publisher

Medical Journal Sweden AB
DOI: 10.1080/17453674.2020.1815981

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Background and purpose - Indication for lumbar disc herniation (LDH) surgery is usually to relieve sciatica. We evaluated whether back pain also decreases after LDH surgery. Patients and methods - In the Swedish register for spinal surgery (SweSpine) we identified 14,097 patients aged 20-64 years, with pre- and postoperative data, who in 2000-2016 had LDH surgery. We calculated 1-year improvement on numeric rating scale (rating 0-10) in back pain (N-back) and leg pain (N-leg) and by negative binomial regression relative risk (RR) for gaining improvement exceeding minimum clinically important difference (MCID). Results - N(leg)was preoperatively (mean [SD]) 6.7 (2.5) and N(back)was 4.7 (2.9) (p < 0.001). Surgery reduced N(leg)by mean 4.5 (95% CI 4.5-4.6) and N(back)by 2.2 (CI 2.1-2.2). Mean reduction in N-leg) was 67% and in N(back)47% (p < 0.001). Among patients with preoperative pain >= MCID (that is, patients with significant baseline pain and with a theoretical possibility to improve above MCID), the proportion who reached improvement >= MCID was 79% in N(leg)and 60% in N-back. RR for gaining improvement >= MCID in smokers compared with non-smokers was for N(leg)0.9 (CI 0.8-0.9) and -N(back)0.9 (CI 0.8-0.9), and in patients with preoperative duration of back pain 0-3 months compared with > 24 months for N(leg)1.3 (CI 1.2-1.5) and for N(back)1.4 (CI 1.2-1.5). Interpretation - LDH surgery improves leg pain more than back pain; nevertheless, 60% of the patients with significant back pain improved >= MCID. Smoking and long duration of pain is associated with inferior recovery in both N(leg)and N-back.

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