Survival Rates and Risk Factors for Cephalad and L5-S1 Adjacent Segment Degeneration after L5 Floating Lumbar Fusion : A Minimum 2-Year Follow-Up
Journal of Korean Neurosurgical Society
;
: 108-113, 2015.
Article
in English
| WPRIM
| ID: wpr-190404
ABSTRACT
OBJECTIVE:
Although the L5-S1 has distinct structural features in comparison with other lumbar spine segments, not much is known about adjacent segment degeneration (ASD) at the L5-S1 segment. The aim of study was to compare the incidence and character of ASD of the cephalad and L5-S1 segments after L5 floating lumbar fusion.METHODS:
From 2005 to 2010, 115 patients who underwent L5 floating lumber fusion were investigated. The mean follow-up period was 46.1 months. The incidence of radiological and clinical ASD of the cephalad and the L5-S1 segments was compared using survival analysis. Risk factors affecting ASD were analyzed using a log rank test and the Cox proportional hazard model.RESULTS:
Radiological ASD of the L5-S1 segment had a statistically significant higher survival rate than that of the cephalad segment (p=0.001). However, clinical ASD of the L5-S1 segment was significantly lower survival rates than that of the cephalad segment (p=0.038). Risk factor analysis showed that disc degeneration of the cephalad segment and preoperative spinal stenosis of the L5-S1 segment were risk factors.CONCLUSION:
In L5 floating fusion, radiological ASD was more common in the cephalad segment and clinical ASD was more common in the L5-S1 segment. At the L5-S1 segment, the degree of spinal stenosis appears to be the most influential risk factor in ASD incidences, unlike the cephalad segment.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Spinal Stenosis
/
Spine
/
Proportional Hazards Models
/
Incidence
/
Survival Rate
/
Risk Factors
/
Follow-Up Studies
/
Intervertebral Disc Degeneration
Type of study:
Etiology study
/
Incidence study
/
Observational study
/
Prognostic study
/
Risk factors
Limits:
Humans
Language:
English
Journal:
Journal of Korean Neurosurgical Society
Year:
2015
Type:
Article
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