目的 分析腰椎间盘突出症发病 危险因素及CT影像特点。方法 选择经手 术病理证实的腰椎间盘突出症患者、同期 行健康体检者各50例，分别为观察组与对 照组，通过自行设计的流行病学调查表对 照分析总结腰椎盘突出症发病危险因素。 同时分析不同程度腰椎间盘突出症CT影像 特点。结果 多因素及Logistic回归分析, 腰椎间盘突出症发病独立危险因素为体质 量指数、持续坐位时间、腰部损伤史及弯 腰程度。轻度者突出物以弧形边缘光滑为 主，髓核脱出或突出，髓核疝密度以≤80 为主，1区水平面突出面积大，神经根以 紧贴为主；中度、重度者以山丘状边缘不 规整为主，髓核脱出为主，髓核疝密度以 ＞100为主，3区水平面突出面积大，神 经根受压、紧贴或粘连。结论 体质量指 数、持续坐位时间、腰部损伤史及弯腰程 度为腰椎间盘突出症发病独立危险因素。 腰椎间盘突出症不同严重程度CT影像特点 存在较大的区别。

Objective To analyze the risk factors and CT imaging features of lumbar disc herniation. Methods 50 cases of patients with lumbar disc herniation confirmed by operation and pathology were selected as the observation group and another 50 cases of healthy controls were selected as the control group at the same time. According to the self-designed epidemiological questionnaires, the risk factors of lumbar disc herniation were analyzed and summarized and the CT imaging features of lumbar disc herniation of different degrees were also analyzed. Results Multiple and Logistic regression analysis showed that body mass index, continuous sitting time, waist injury history and bending degree were the independent risk factors of lumbar disc herniation. The protrusions in mild patients were with curved edges which were smooth. The nucleus pulposus prolapsed or protruded. The nucleus pulposus herniation density mainly was equal to or less than 80. The protruding area of zone 1 horizontal plane was large and the nerve root mainly was clinging. Moderate and severe patients were with hill-shaped margins which were irregular. The nucleus pulposus mainly prolapsed. The density of nucleus pulposus herniation mainly was more than 100. The protruding area of zone 3 horizontal plane was large and nerve root was compressed, clinging or adhesive. Conclusion Body mass index, continuous sitting time, waist injury history and bending degree were the independent risk factors of lumbar disc herniation. There are significant differences in CT imaging features between different severity of lumbar disc herniation.