JAMA Oncol:超重时间越久,结直肠癌风险越高!

2022-03-21 Nebula MedSci原创

预防或扭转当下日益增加的超重/肥胖率或可有助于预防大部分结直肠癌及其他可能与肥胖相关的癌症

据WHO估计,全球至少有3亿肥胖成年人,14亿人超重。超重与癌症风险增加有关,但风险可能被低估了,因为之前的研究没有考虑累积的终生暴露。超重是结直肠癌已知的风险因素。

本研究旨在评估累积终生超重与结直肠癌 (CRC) 风险的相关性。

这是一项在德国开展的自2003年开始的基于人群的病例对照研究,从5635名 CRC 患者和4515名对照个体中获取了他/她们从20岁到当前年龄10年期间的身高和自我报告的体重。体重指数(BMI)=体重(kg)÷身高2(m2),计算每位受试者20岁起每年的BMI,绘制线性曲线图。每个年龄的超额BMI (eBMI) 定义:BMI-25,如果BMI低于25,则eBMI=0;最后跨年龄求和以获得超重或肥胖(WYO)的加权年数,即 年 x eBMI。采用多重逻辑回归分析估计不同年龄的BMI和WYO与CRC风险的相关性。

eBMI和WYO每增加一个SD时的结直肠风险变化

CRC 患者(n=5635)的平均年龄是68.4岁,其中3366位(59.7%)是男性;对照者(n=4515)的平均年龄是68.5岁,其中2759位(61.1%)是男性。与保持正常范围体重的受试者相比,WYO与CRC风险存在相关性,校正风险比(OR)波动在1.25-2.54(从WHO的第1四分位至第4四分位)。WYO每增加一个SD值,CRC风险就增加5%(校正OR 1.55)。该OR高于任何一个时间点eBMI每增加一个SD值所增加的OR(范围:1.04-1.27)。

该研究结果提示,长期超重对结直肠癌风险的影响明显高于基于单个时间节点BMI测量所估计的作用,简言之,既往我们都低估了长期超重对结直肠癌风险的增加作用。预防或扭转当下日益增加的超重/肥胖率或可有助于预防大部分结直肠癌及其他可能与肥胖相关的癌症。

原始出处:

Li X, Jansen L, Chang-Claude J, Hoffmeister M, Brenner H. Risk of Colorectal Cancer Associated With Lifetime Excess Weight. JAMA Oncol. Published online March 17, 2022. doi:10.1001/jamaoncol.2022.0064

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    2022-10-31 sjq027
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    2022-11-28 minlingfeng
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