Objective:The aim of this research was to explore the characteristics in spinal imaging of lumbar developmental spinal stenosis (DSS) and its risk factors.Methods:In this study,a total of 439 subjects underwent lumbar magnetic resonance examination,and the parameters of their MRI images were measured.Firstly,anteroposterior vertebral canal diameters were used to differentiate those with DSS from controls.Then,the age,gender,BMI and other imaging parameters,including sagittal vertebral diameter,sagittal vertebral height,anteroposterior vertebral diameter,mid-vertebral width,interpedicular distance,pedicle width,dural sac diameter,laminar angle,were compared and analyzed.Results:Compared with the control group,DSS group had significant differences in anteroposterior vertebral diameter,mid-vertebral width,interpedicular distance,dural sac diameter,laminar Angle,facet joint angle,sagittal vertebral diameter,Pfirrmann degeneration grade,Disc herniation classification and radicular leg pain.Further logistic regression analysis showed that only laminar angle and dural sac diameter were risk factors for DSS.Conclusion:Laminar angle and dural sac diameter may be risk factors for DSS,and the influence factor of Laminar angle is significantly higher than that of the latter.Other skeletal parameters are spared.This study also found no significant correlation between the degenerative changes of intervertebral disc and DSS,which indicating that DSS may be the result of bony maldevelopment.
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