Spine :腰痛和多裂肌脂肪浸润相关性随年龄而变化

2014-09-12 紫川秀第二 童勇骏 丁香园

腰痛是人群中较为常见的疾病,文献报道约80%以上的患者在其一生中会经历腰背部疼痛,但大部分人均无明显病因,临床上将此类腰痛归结为非特异性腰痛。已有的研究表明,患者的腰痛和生物,生理及局部因子刺激等有关。 文献报道,腰背部多裂肌肉的脂肪浸润是腰背部疼痛非常重要的因素,其在腰背部节段稳定性维持占据非常重要的作用。但上述结论来源较小样本的研究报道,结论强度较差。近期来自澳大利亚的学者Jeffrey J

腰痛是人群中较为常见的疾病,文献报道约80%以上的患者在其一生中会经历腰背部疼痛,但大部分人均无明显病因,临床上将此类腰痛归结为非特异性腰痛。已有的研究表明,患者的腰痛和生物,生理及局部因子刺激等有关。

文献报道,腰背部多裂肌肉的脂肪浸润是腰背部疼痛非常重要的因素,其在腰背部节段稳定性维持占据非常重要的作用。但上述结论来源较小样本的研究报道,结论强度较差。近期来自澳大利亚的学者Jeffrey J就腰背部多裂肌脂肪浸润和腰背部疼痛的相关性进行了研究,相关结论发表在spine杂志上。

该横断面研究分析了腰背部多裂肌脂肪浸润(Lumbar multifidus intramuscular adipose tissue, LM-IMAT)和腰背部疼痛(low back pain, LBP)之间的相关性,并探讨了IMAT在预测5-9年后患者发生腰背部疼痛(LBP)的可能性。

研究纳入的人群为40岁成人,随机从人群中选取,并随访记录45,49岁时的相关状况。共401例患者纳入研究,其中331例患者获得5年后的随访,而286例患者获得9年后的随访。

在每个时间点,对所有随访的人群进行腰背部的MRI检测,并记录是否有腰背部疼痛,腰背部疼痛的时间,是否有放射痛至下肢等。

依据MRI上腰背部肌肉的LM IMAT程度,将其分为正常/轻度,中度,重度等。使用线性回归模型来计算调整后的OR值(aORs),以确定LBP和LM IMAT的关系。相关变量包括:性别,体重指数,职业及物理锻炼时间。

研究者通过横断面的研究发现,40岁时,有严重IMAT浸润的患者和既往腰背部疼痛及腿痛的发生呈现显著相关性(OR值均大于2)。但是随着时间推移,45岁及49岁时,患者的LM IMAT和LBP的发生之间相关性呈现不确定性改变,即LM IMAT并不能准确的预测LBP或腿痛的发生。

作者在讨论中认为,出现患者40岁时IMAT和LBP有关联,而在45岁及49岁时无关联的原因可能是,腰背部肌肉的脂肪浸润是持续进展的,对年轻的人群,腰背部肌肉脂肪浸润是一个相对病态的过程,其和腰背部疼痛有直接关联,而随着年龄增大,腰背部肌肉脂肪浸润开始成为一个退变性的正常生理过程,由此而出现了腰背部脂肪浸润在早期和LBP有相关性,而在较晚期时,和LBP相关性变差。

作者总结,LBP和LM IMAT在年轻人群中有很好相关性,但随着年龄增大,相关性降低。

原始出处

Hebert JJ1, Kjaer P, Fritz JM, Walker BF.The relationship of lumbar multifidus muscle morphology to previous, current, and future low back pain: a 9-year population-based prospective cohort study.Spine (Phila Pa 1976). 2014 Aug 1

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    2014-09-29 mgqwxj
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    2014-09-26 匿名用户

    好文章!

    0

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    2014-09-26 匿名用户

    好文章!

    0