SD of all groups was not obvious different in L4-S1 segments, TD of every groups above 15 years old was larger than that of two groups below(P<0.05);

各年龄组椎管矢径无明显差异；L4-S1节段15岁以上各组椎管横径大于以下两组（P<0.05）；

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SD of all groups was not obvious different in L4-S1 segments, TD of every groups above 15 years old was larger than that of two groups below(P<0.05);

各年龄组椎管矢径无明显差异；L4-S1节段15岁以上各组椎管横径大于以下两组（P<0.05）；

youdao