Abstract：
Investigating the correlation between the interlaminar space size on plain radiograph and lumbar spinal stenosis (LSS).
100 Patients with LSS and 100 normal participants without LSS were included in this study. Lumbar interlaminar parameters were measured on plain radiographs. Spinal canal parameters were measure on CT and MRI. These image parameters were compared between LSS and control group. The linear correlation among interlaminar parameters, spinal canal parameters and Oswestry Disability Index (ODI) were analyzed. The cut-off values of interlaminar parameters for diagnosing L3/4 and L4/5 symptomatic LSS were analyzed.
Excepting for L1/2 interlaminar width, all interlaminar and spinal canal related parameters in LSS group were significantly smaller than those in control group. Excepting for L1/2 interlaminar width and L5/S1 interlaminar height, all interlaminar parameters had significantly positive linear correlation with spinal canal parameters accordingly in each lumbar level. For diagnosis of symptomatic LSS, The cut off values of L4/5 interlaminar width, height and area were 18.46 mm, 11.37 mm and 134.05 mm2 while 15.78 mm, 13.59 mm and 157.98 mm2 in L3/4. Both spinal canal size and interlaminar size had no linear correlation with ODI in cases of L4/5 LSS.
Lumbar interlaminar space size on plain radiograph has positive linear correlation with developmental and degenerative LSS, excepting for L1/2 interlaminar width and L5/S1 interlaminar height. Lumbar plain radiograph can be a feasible way for predicting and helping to diagnose LSS through evaluating the interlaminar space size.
III.
100 Patients with LSS and 100 normal participants without LSS were included in this study. Lumbar interlaminar parameters were measured on plain radiographs. Spinal canal parameters were measure on CT and MRI. These image parameters were compared between LSS and control group. The linear correlation among interlaminar parameters, spinal canal parameters and Oswestry Disability Index (ODI) were analyzed. The cut-off values of interlaminar parameters for diagnosing L3/4 and L4/5 symptomatic LSS were analyzed.
Excepting for L1/2 interlaminar width, all interlaminar and spinal canal related parameters in LSS group were significantly smaller than those in control group. Excepting for L1/2 interlaminar width and L5/S1 interlaminar height, all interlaminar parameters had significantly positive linear correlation with spinal canal parameters accordingly in each lumbar level. For diagnosis of symptomatic LSS, The cut off values of L4/5 interlaminar width, height and area were 18.46 mm, 11.37 mm and 134.05 mm2 while 15.78 mm, 13.59 mm and 157.98 mm2 in L3/4. Both spinal canal size and interlaminar size had no linear correlation with ODI in cases of L4/5 LSS.
Lumbar interlaminar space size on plain radiograph has positive linear correlation with developmental and degenerative LSS, excepting for L1/2 interlaminar width and L5/S1 interlaminar height. Lumbar plain radiograph can be a feasible way for predicting and helping to diagnose LSS through evaluating the interlaminar space size.
III.
摘要：
目的：研究X线平片上的层间间隙大小与腰椎管狭窄（LSS）之间的相关性。
方法：本研究包括100例LSS患者和100例无LSS的正常参与者。在平片上测量腰椎层间参数。在CT和MRI上测量椎管参数。在LSS和对照组之间比较这些图像参数。层间参数之间的线性相关性，分析椎管参数和Oswestry残疾指数（ODI）。分析了诊断L3/4和L4/5症状性LSS的层间参数的临界值。
结果：L1/2层间宽度除外，LSS组的所有椎板间和椎管相关参数均明显小于对照组。除L1/2层间宽度和L5/S1层间高度外，在各个腰椎层面,所有椎间参数与椎管参数均具有显著正线性相关性.对于有症状的LSS的诊断，L4/5层间宽度的截止值，高度和面积为18.46毫米，11.37mm和134.05mm2，而15.78mm，L3/4中的13.59mm和157.98mm2。在L4/5LSS的情况下，椎管大小和椎间大小与ODI没有线性相关。
结论：X线片上的腰椎层间间隙大小与发育性和退行性LSS呈正线性相关，除L1/2层间宽度和L5/S1层间高度外。腰椎平片可以通过评估层间空间大小来预测和帮助诊断LSS。
方法：III.
方法：本研究包括100例LSS患者和100例无LSS的正常参与者。在平片上测量腰椎层间参数。在CT和MRI上测量椎管参数。在LSS和对照组之间比较这些图像参数。层间参数之间的线性相关性，分析椎管参数和Oswestry残疾指数（ODI）。分析了诊断L3/4和L4/5症状性LSS的层间参数的临界值。
结果：L1/2层间宽度除外，LSS组的所有椎板间和椎管相关参数均明显小于对照组。除L1/2层间宽度和L5/S1层间高度外，在各个腰椎层面,所有椎间参数与椎管参数均具有显著正线性相关性.对于有症状的LSS的诊断，L4/5层间宽度的截止值，高度和面积为18.46毫米，11.37mm和134.05mm2，而15.78mm，L3/4中的13.59mm和157.98mm2。在L4/5LSS的情况下，椎管大小和椎间大小与ODI没有线性相关。
结论：X线片上的腰椎层间间隙大小与发育性和退行性LSS呈正线性相关，除L1/2层间宽度和L5/S1层间高度外。腰椎平片可以通过评估层间空间大小来预测和帮助诊断LSS。
方法：III.
