Recovery Pattern after Decompression of Central Lumbar Spinal Stenosis – a Prospective Observational Cohort Study

Background: Detailed preoperative information is associated with superior outcomes. We aimed to describe the recovery pattern after decompression of central lumbar spinal stenosis (CLSS). Methods 50 patients aged 51–85 years who underwent decompression without fusion due to CLSS were followed from before to after surgery (post op day 1,7, and 14). Back and leg pain were evaluated using the Numeric Rating Scale (NRS; 0 = no pain 0, 10 = worst pain) and quality of life using the EuroQol-5D index (0 = death, 1 = best), and EQ-5D-visual analogue scale (VAS; 0 = worst, 100 = best). Results NRS leg pain was reduced from preoperative to first postoperative day by 5.2 (6.1,4.3) (mean (95%CI)], and NRS back pain from postoperative day 1 to 7 by 0.6 (1.2,0.03) and from day 7 to 14 by 0.7 (1.3,0.2)]. In contrast, EQ-5D index increased from preoperative to first postoperative day by 0.09 (0.06,0.13) and from day 1 to 7 by 0.05 (0.02,0.08), and EQ-5D VAS from preoperative to first postoperative day by 13.7 (9.1,18.3) and from day 1 to 7 by 6.0 (2.0,10.0). After two weeks, 51% of the patients had improved above the minimal clinically important difference (MCID) in back pain and 71% in leg pain. Conclusion Patients scheduled for decompression due to CLSS should be informed that improvement in leg pain and quality of life in general can be expected within one day of surgery, that quality of life improves a little further in the first postoperative week, and that back pain improves in the first 2 postoperative weeks. In most patients, decompression without fusion due to CLSS seems to achieve clinically relevant improvement within 2 weeks.