Changde Vocational Technical College, Changde, Hunan, China.
Xiangya School of Nursing, Central South University, Changsha, Hunan, China.
J Healthc Eng. 2021 Jan 16;2021:6680698. doi: 10.1155/2021/6680698. eCollection 2021.
Colorectal cancer has become the second most common type of cancer in females and the third most common type of cancer in males. The incidence rate of colorectal cancer is increasing along with the change of lifestyle and dietary habits in East Asia. The cause of colorectal cancer is complex; environmental factors and genetic factors affect each other. Dietary fiber is considered as the prevention of colorectal cancer. Epidemiological data in Europe and America have suggested that dietary fiber intake is negatively correlated with colorectal cancer incidence rate. However, the evidence among different populations is inconsistent, and little is known about these associations in Eastern Asian areas.
To critically review all available human epidemiological data on the relationship between dietary fiber intake and colorectal cancer in Eastern Asian countries and make recommendations for these populations. . PubMed and Embase were used to search online research papers regarding the relationship between dietary fiber intake and the risk of colorectal cancer in Eastern Asian. We located 9 publications, of which the sample size ranged from 266 to 78, 326.
Five case-control studies, as well as one prospective study, have examined significant preventive effects of dietary fiber intake on the risk of colorectal cancer while evidence from three prospective cohorts suggested no preventive effects of dietary fiber intake on colorectal cancer among these populations. There is no consistent conclusion on the protective effect of dietary fiber from different sources and types.
The association between dietary fiber intake and colorectal cancer risk in Chinese, Japanese, and Korean is considered to be plausible by the available literature. This current review cannot substantiate the preventive effect of dietary fiber intake on colorectal cancer due to the limited available evidence analyzed.
结直肠癌已成为女性第二大常见癌症类型，男性第三大常见癌症类型。在东亚，随着生活方式和饮食习惯的改变，结直肠癌的发病率也在不断上升。结直肠癌的病因较为复杂，环境因素和遗传因素相互影响。膳食纤维被认为是预防结直肠癌的物质。欧洲和美国的流行病学数据表明，膳食纤维的摄入量与结直肠癌的发病率呈负相关。然而，不同人群的证据并不一致，对于东亚地区人群，这些关联的了解甚少。
系统评价东亚国家膳食纤维摄入量与结直肠癌关系的所有可用人类流行病学数据，并为这些人群提出建议。方法：检索PubMed 和 Embase 在线研究论文，探讨东亚国家膳食纤维摄入量与结直肠癌风险之间的关系。我们共找到了 9 篇文献，其中样本量范围为 266 至 78326 人。
5 项病例对照研究和 1 项前瞻性研究表明，膳食纤维摄入量对结直肠癌的风险有显著的预防作用，而来自 3 项前瞻性队列研究的证据表明，膳食纤维摄入量对这些人群的结直肠癌没有预防作用。不同来源和类型的膳食纤维的保护作用尚无一致的结论。
现有文献认为，膳食纤维摄入量与中国人、日本人、韩国人结直肠癌风险之间存在关联。由于分析的可用证据有限，本综述不能证实膳食纤维摄入量对结直肠癌的预防作用。
