Unilateral biportal endoscopic decompression versus microscopic or microendoscopic decompression for single-level lumbar spinal stenosis: an updated systematic review and meta-analysis
BMC Musculoskeletal Disorders · 6 Oct 2026
† Impact is the editorial-priority score. All scores are out of 100. Clinical is a stored clinical-importance score from the earlier method; it has not been recalculated.
Why it matters
Lumbar stenosis decompression is one of the most common spine operations, and this review suggests that the newer biportal endoscopic technique offers no clear symptom advantage over established microscopic approaches, so technique choice can rest on surgeon experience and resources.
The evidence
This meta-analysis pooled 15 comparative studies (2 randomised trials and 13 cohorts, 1,426 patients) comparing unilateral biportal endoscopic (UBE) decompression with microscopic or microendoscopic decompression for single-level degenerative lumbar spinal stenosis. Pain and disability were essentially the same between techniques, for example a long-term ODI difference of -0.30 points (95% CI -0.80 to 0.21). UBE was associated with a shorter hospital stay (about 1.6 days, but highly inconsistent across studies) and lower complication odds (OR 0.54), a signal driven mainly by observational studies and not seen in the randomised trials.
A coherent primary effect estimate is unavailable. Clinical relevance does not estimate treatment benefit.
Why this rigour score?
Meta-analysis (mixed designs)Design starting point: 42.6
Raised the score
- Compared against current standard of care+3.4
- Comprehensive literature search+3.4
Lowered the score
- Pools mixed study designs−3.4
Score capped at 55. The conclusion asserts a benefit the primary outcome did not show.
Methods at a glance
Recorded assessment- Comprehensive literature searchMet
- Risk of bias assessedMet
- Bias considered in synthesisMet
- Publication bias assessedMet
- Study exclusions justifiedMet
- Prospective registrationNot met
Not reported does not mean not done. Checks have different weights; this is not a count of boxes ticked.
See the full score breakdown
- Study design starting point
- 42.6
- Compared against current standard of care
- +3.4
- Pools mixed study designs
- −3.4
- Comprehensive literature search
- +3.4
- Risk of bias assessed in the included studies
- +3.4
- Risk of bias carried into the synthesis
- +2.5
- Excluded studies listed and justified
- +1.7
- Publication bias assessed
- +2.5
- Methodological cap
- −1.2
- Final rigour score rounded
- 55 / 100
Study design sets the starting point and a ceiling of 82. Recorded methods then adjust the score. Points are shown to one decimal place; the final score uses unrounded values.
Checklist from the stored appraisal. “Not met” describes the recorded criterion; it does not always produce a deduction. This overview supports reading the full study.
For journal club
1.If pain and disability outcomes are similar between UBE and microscopic decompression, how should a surgeon counsel a patient with single-level stenosis who asks for the 'least invasive' option?
2.Given that the shorter hospital stay with UBE may reflect local discharge practices, what factors should guide decisions about same-day or early discharge after lumbar decompression regardless of technique?
Original publication title
Unilateral biportal endoscopic decompression versus microscopic or microendoscopic decompression for single-level lumbar spinal stenosis: an updated systematic review and meta-analysis