JAMA子刊:630万人数据告诉你,肥胖并不是对健康百害而无一利!

2021-04-03 MedSci原创 MedSci原创

肥胖与癌症患者的总体死亡率较高有关。但肥胖同时也能降低肺癌、肾细胞癌和黑色素瘤的患者的总体死亡风险。

肥胖(一般定义为身体质量指数BMI>30)已经被认为是一种慢性疾病,在世界范围内发病率越来越高,这在很大程度上导致了许多健康问题。体脂增加是许多严重疾病(包括心脏疾病、代谢综合征甚至中风等)的重要风险因素。

已有许多大型流行病学研究评估了肥胖和死亡率之间的关系。特别是,对包括3000多万人在内的230项队列研究的荟萃分析发现,肥胖和超重都与全因死亡风险增加有关。尽管如此,但仍有一些研究得出结论,体重指数升高可能会提高血管疾病患者的存活率,这种现象被称为“肥胖悖论”。

同时,目前已知BMI的增加也与多种癌症类型的风险增加有关。此外,肥胖和超重可能会增加癌症死亡率。导致癌症发病率和死亡率较高的机制可能包括性激素代谢、胰岛素和胰岛素样生长因子水平以及脂肪因子途径的改变等。

那么,是否肥胖对身体健康,尤其是癌症的发生、发展真的百害而无一利吗?最近,发表在《美国医学会杂志》子刊JAMA Network Open杂志上的荟萃分析,评估肥胖和癌症诊断结果之间的关系。

研究人员检索了PubMed、Cochrane和EMBASE数据库,选择包括使用标准BMI类别和癌症报告肥胖患者预后的研究。在1892项检索到的研究中,203项(17%)研究共6320365名参与者符合初始评估的纳入标准。

研究的主要结果是癌症患者的总生存率,有无肥胖。次要终点是癌症特异性生存率(CSS)、无进展生存率(PFS)或无疾病生存率(DFS)。总的来说,与非肥胖患者相比,肥胖的癌症患者全因死亡风险增加14%(HR=1.14),癌症特异性风险则增加17%(HR=1.17)。

具体说来,肥胖对不同癌症类型引起的全因死亡风险和癌症特异性风险不一。例如,肥胖分别增加乳腺癌结直肠癌胰腺癌和子宫内膜癌全因死亡风险为26%、22%、36%和20%;但同时降低肺癌、黑色素瘤和肾癌全因死亡风险为14%、26%和22%。

在癌症特异性死亡风险方面,肥胖仍表现不一。与非肥胖癌症患者相比,肥胖与膀胱或上尿路尿路上皮癌、乳腺癌、结直肠癌、头颈癌、胰腺癌和前列腺癌特异性死亡风险分别升高36%、23%、24%、35%、28%和26%相关,与胃食管癌、肝癌和肺癌特异性死亡风险分别降低17%、21%和47%相关。

同时,肥胖的癌症患者整体复发风险也增加了13%。肥胖增加上尿路尿路上皮癌、乳腺癌、结直肠癌、胃食管癌和前列腺癌42%、14%、15%、62%和29%的复发风险,却降低肺癌、黑色素瘤和肾癌45%、21%和31%的复发风险。

综上,该研究表明,肥胖与癌症患者的总体死亡率较高有关。但肥胖同时也能降低肺癌、肾细胞癌和黑色素瘤的患者的总体死亡风险。

 

参考文献:

Petrelli F, et al. Association of Obesity With Survival Outcomes in Patients With Cancer: A Systematic Review and Meta-analysis. JAMA Netw Open. 2021 Mar 1;4(3):e213520. doi: 10.1001/jamanetworkopen.2021.3520.

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    2021-04-06 148bedacm12暂无昵称

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    2021-04-05 ms1000001691009964

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    2021-04-03 旺医

    顶刊就是顶刊,谢谢梅斯带来这么高水平的研究报道,我们科里同事经常看梅斯,分享梅斯上的信息

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    2021-04-03 废不废柴

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    2021-04-03 溪溪是福娃

    胖着???

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