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AIM To assess the correlation of lateral recess stenosis(LRS) of lumbar segments L4/5 and L5/S1 and the Oswestry Disability Index(ODI).METHODS Nine hundred and twenty-seven patients with history of low back pain were included in this uncontrolled study.On magnetic resonance images(MRI) the lateral recesses(LR) at lumbar levels L4/5 and L5/S1 were evaluated and each nerve root was classified into a 4-point grading scale(Grade 0-3) as normal,not deviated,deviated or compressed.Patient symptoms and disability were assessed using ODI.The Spearman’s rank correlation coefficient was used for statistical analysis(P < 0.05).RESULTS Approximately half of the LR revealed stenosis(grade 1-3;52% at level L4/5 and 42% at level L5/S1) with 2.2% and 1.9% respectively reveal a nerve root compression.The ODI score ranged from 0%-91.11% with an arithmetic mean of 34.06% ± 16.89%.We observed a very weak statistically significant positive correlation between ODI and LRS at lumbar levels L4/5 and L5/S1,each bilaterally(L4/5 left:rho < 0.105,P < 0.01;L4/5 right:rho < 0.111,P < 0.01;L5/S1 left:rho 0.128,P < 0.01;L5/S1 right:rho < 0.157,P < 0.001).CONCLUSION Although MRI is the standard imaging tool for diagnosing lumbar spinal stenosis,this study showed only a weak correlation of LRS on MRI and clinical findings.This can be attributed to a number of reasons outlined in this study,underlining that imaging findings alone are not sufficient to establish a reliable diagnosis for patients with LRS.
AIM To assess the correlation of lateral recess stenosis (LRS) of lumbar segments L4 / 5 and L5 / S1 and the Oswestry Disability Index (ODI) .METHODS Nine hundred and twenty-seven patients with history of low back pain were included in this uncontrolled magnetic resonance images of the lateral recesses (LR) at lumbar levels L4 / 5 and L5 / S1 were evaluated and each nerve root was classified into a 4-point grading scale (Grade 0-3) as normal, not deviated, deviated or compressed. Patients with symptoms and disability were assessed using ODI.The Spearman’s rank correlation coefficient was used for statistical analysis (P <0.05) .RESULTS Approximately half of the LR revealed stenosis (grades 1-3; 52% at level L4 / 5 and 42% at level L5 / S1) with 2.2% and 1.9% respectively revealed a nerve root compression. The ODI score ranged from 0% to 91.11% with an arithmetic mean of 34.06% ± 16.89% .We observed a very weak statistically significant positive correlation between ODI and LRS at lumbar levels L4 / 5 and L5 / S1, ea L5 / S1 right: rho 0.128, P <0.01; L5 / S1 right: rho <0.157; L5 / S1 left: P <0.001) .CONCLUSION Although MRI is the standard imaging tool for diagnosed lumbar spinal stenosis, this study showed only a weak correlation of LRS on MRI and clinical findings. This can be attributed to a number of reasons outlined in this study, underlining that imaging findings alone are not sufficient to establish a reliable diagnosis for patients with LRS.