Should We Avoiding Colorectal Cancer by Eating Less “Risk” Red Meat? a Case Study in Canada

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Should We Avoiding Colorectal Cancer by Eating Less “Risk” Red Meat? A Case Study in Canada

Abstract
The connection of red meat consumption and some certain cancers, especially colorectal cancer, has been a scientific debate for a long time. Quite many observational studies have associated high red meat consumption with potential risk of colorectal cancer. There are certain relevant associations suggest that people should limit the intake of red meat to certain amount, for instance, 500g per week, particularly processed or overcooked red meat. The object of this paper is to study the case in Canada by using a single log form model to analyze the correlation of red meat consumption and colorectal cancer, adopting the annual data from 1981 to 2010 in Canada Statistics. In addition, there is a statement that white meat is a better substitution for the risky red meat, so in this paper, we also try to find out whether other healthier white meat, such as poultry and fish, can be a good replacement of red meat. According to the result of the analysis in this paper, we find that red meat consumption doesn’t correlate with colorectal cancer strongly, which emphasize a good healthy life style is the main factor to keep cancer incidence low, but not the consumption of some other things.

Keywords: Red meat, Colorectal cancer, Poultry, Fish, Substitutable meat

Introduction
Colorectal cancer is referring to colon and rectal cancer, as they come from the same type of cell and have many similarities. It is the third leading cancer in the world, and it's surprised to find that about 60% of cases were diagnosed in developed countries. The Main factors causing colorectal cancer are follows:

Table 1 Factors Modifying the Risk of Colorectal Cancer-Canadian (Cancer Statistic 2011)
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For non-modifiable risk factors, advancing age is the single biggest risk factor for colorectal cancer, with around 84% of cases diagnosed in people aged 60 years and over (Cancer Research UK 2011). However, for modifiable risk factors, colorectal cancer is frequent in Western countries where red meat is frequently consumed. In contrast, this type of cancer is rare in less affluent countries where meat intake is low (Bingham & Riboli, 2004). There are many studies come to the above similar conclusion by the primary research methodology: Meta-analysis. A meta-analysis is a statistical approach that gathers all data from published epidemiological studies, after exclusion of poor quality studies. Retrospective case–control studies, including some prospective cohort studies are commonly used. However, these studies still do not give us the explicit answer. For example, Correlation between cancer mortality and red meat consumption is strongly suggested although it's only one of the factors. Until now, no one knows the exact weight of this factor. What’s more, the research result might be different depending on the chosen groups. In this paper, we try to make detail study on this issue by studying a case in Canada, using the methodology-Regression Model analysis, taking the relative sample data from Canada Statistics, to see how strong the relationship between red meat and colorectal cancer situation in Canada. In addition, Consumption of white meat, mostly poultry, is not associated with cancer risk (confidence interval is 0.90–1.13), and a high intake of fish brings a significant protection (confidence interval is 0.75–0.98) (Denis E. Corpet, 2011). Thus, due to the “risky” red meat, another subject of the paper is to see whether healthier meat (poultry and fish) can be a good substitution for red meat. The paper is organized as five sections. The first section is introduction; The second section illustrates the estimation method and data processing; The third section shows graph analysis of relative variables, giving us an intuitional understanding of the interaction among them; The fourth section gives the result of the...
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