DDW 2012:英研究显示膳食脂肪与食管癌相关

2012-06-23 佚名 爱唯医学网

  芝加哥(EGMN)–消化疾病周(DDW)上报告的一项前瞻性队列研究显示,食物中脂肪总量和饱和脂肪酸含量与食管腺癌风险呈正相关,但与Barrett食管无关。   英国诺福克和诺维奇大学医院的Max Yates医生进行的这项研究旨在评估膳食脂肪在Barrett食管和食管腺癌发病中的作用。Barrett食管是一种以食管下段细胞化生为特征的疾病,被认为是食管腺癌的一个危险因素。   该研究采用前瞻

  芝加哥(EGMN)–消化疾病周(DDW)上报告的一项前瞻性队列研究显示,食物中脂肪总量和饱和脂肪酸含量与食管腺癌风险呈正相关,但与Barrett食管无关。

  英国诺福克和诺维奇大学医院的Max Yates医生进行的这项研究旨在评估膳食脂肪在Barrett食管和食管腺癌发病中的作用。Barrett食管是一种以食管下段细胞化生为特征的疾病,被认为是食管腺癌的一个危险因素。

  该研究采用前瞻性队列设计,研究队列从EPIC(欧洲前瞻性肿瘤与营养研究)Norfolk国家数据库中招募。EPIC研究纳入了10个国家的500,000余人,EPIC-Norfolk队列中包括来自农村、城市郊区和城市内部区域的23,750例参与者(年龄45~74岁)。研究人群分为3组: 3,667例随机选择的对照者、100例Barrett食管患者和61例食管腺癌患者。对照者与Barrett食管患者年龄相似(募集时中位年龄59~60岁),而食管腺癌患者的年龄较上述两组高7岁左右(中位67岁)。各组男性占80%以上。在这一前瞻性队列中,Barrett食管和食管腺癌患者诊断时的中位年龄分别为67和73岁。入选时,在营养师帮助下,参与者记录7天食物日记,研究者称这是“经过验证的、最准确的用于大规模流行病学研究的实用营养评估形式”。患者记录消耗的所有食物和饮料,同时注明品牌、份额和成分。使用DINER(用于流行病学研究的营养数据)软件对记录进行编码。根据膳食脂肪摄入水平将研究人群分为5组,并使用校正年龄、性别、体重指数、吸烟、饮酒和总能量摄入的Cox回归分析估计风险率。

  结果显示,食物中总脂肪摄入与Barrett食管的诊断之间无相关性。但对于食管腺癌,可在各五分位数区间观察到,随脂肪摄入增加,发病风险逐步增高。“第5(或最高)五分位数区间内患者的风险为摄入量最低者的4倍。”这一发现尚不具有统计学意义,然而,相邻较高五分位数区间风险有比较低区间风险增高50%的趋势,这个结果具有统计学意义(风险率为1.50;95%置信区间1.05~2.14;P=0.03)。饱和脂肪的结果与之相似。未发现膳食中饱和脂肪摄入与Barrett食管诊断之间存在相关性,但前者增加伴随食管腺癌发病风险增高。“第5(或最高)五分位数区间内患者的风险为摄入量最低患者的3倍”,相邻五分位数区间之间的平均增长或趋势具有统计学意义(HR,1.35;95% CI,1.01~1.85;P=04)。

  该研究结果提示,脂肪可能在化生向肿瘤形成的转变过程中发挥重要作用,在未来的腺癌病因学研究中应测定膳食中的脂肪和饱和脂肪。

  该研究由英国肿瘤研究和英国医学研究委员会资助,Yates医生披露无相关利益冲突。

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    2012-06-25 zhaojie88
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    2012-06-25 aids214
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    2012-06-25 zhouqu_8

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