Article Figures & Data
Figures
- Fig. 1
Course of back and leg pain until last follow-up.
Tables
Patient characteristics VTDR ALIF Comparison [p-value] N (total = 179) 48 131 - Mean age (SD) [years] 49.1 (12.5) 45.1 (9.3) 0.023 Female [%] 43.8 71.8 <0.001 Disc herniation [%] 66.7 23.7 <0.001 Additional spinal pathology (%) - 9.9 - ASA unknown - 12.2 - ASA1 (%) - 46.6 ASA2 (%) - 40.5 ASA > 2 (%) - 0.8 Previous treatment 3-6mo. (%) - 13.7 - Previous treatment 6-12mo. (%) - 19.9 - Previous treatment >12mo. (%) - 66.4 - Bisegmental surgery [%] 56.3 21.4 <0.001 Treated segment L3-4 [%] 2.1 3.8 0.64 Treated segment L4-5 [%] 27.1 21.4 Treated segment L5-S1 [%] 70.8 74.8 Overall decompression performed(%) 100.0 86.3 0.007 Discectomy (%) 100.0 86.3 0.007 Sequestrectomy (%) - 8.4 - Foraminotomy (%) - 5.3 - Osteotomy (%) - 0 - Laminotomy (%) - 0 - Hemilaminectomy (%) - 0 - Laminectomy (%) - 0 - Facet joint resection partial (%) - 0 - Facet joint resection full (%) - 0 - Flavectomy (%) - 0 - Other type of decompression (%) - 0 - Back pain at baseline (SD) 8.2 (1.9) 6.9 (2.2) <0.001 Leg pain at baseline (SD) 7.1 (2.9) 4.9 (2.9) <0.001 Average follow-up interval (SD)[months] 16.4 (8.9) 14.5 (8.0) 0.20 Co-variate Effect p-value Estimate 95% confidence intervals Age per year 0.94 0.00 -0.04 0.03 Sex female vs. male 0.008 1.03 0.27 1.78 Disc herniation no vs. yes 0.87 -0.07 -0.87 0.74 Number of segments mono- vs. bisegmental 0.014 1.02 0.21 1.83 Treated segment L3-4 vs. L5-S1 0.016 -2.36 -4.27 -0.45 L4-5 vs. L5-S1 0.36 0.39 -0.44 1.22 Back pain atbaseline per point <0.001 0.87 0.70 1.03 Leg pain atbaseline per point 0.25 -0.07 -0.20 0.05 Treatment VTDR vs. ALIF <0.001 2.76 1.78 3.73 Follow-upinterval per month 0.27 0.02 -0.02 0.07 Co-variates associated with the back pain relief are bold.
Co-variate Effect p-value Estimate 95% confidence intervals Age per year 0.57 -0.01 -0.05 0.03 Sex female vs. male 0.66 0.17 -0.61 0.95 Disc herniation no vs. yes 0.68 -0.17 -1.00 0.66 Number of segments mono- vs. bisegmental 0.029 0.93 0.10 1.77 Treated segment L3-4 vs. L5-S1 <0.001 -3.69 -5.66 -1.71 L4-5 vs. L5-S1 0.31 0.44 -0.42 1.30 Back pain atbaseline per point 0.83 0.02 -0.15 0.19 Leg pain atbaseline per point <0.001 0.83 0.70 0.96 Treatment VTDR vs. ALIF <0.001 2.12 1.12 3.13 Follow-upinterval per month 0.99 0.00 -0.04 0.04 Co-variates associated with the back pain relief are bold.
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