Abstract 4783
Background
Many studies have suggested that dietary calcium has a protective effect on colon cancer development. The mean dietary calcium intake of Koreans is 490 mg/day, which is far less than the recommended intake of calcium 700-800mg/day. In this study, we explored the relationship between dietary calcium intake and colorectal cancer development in Koreans with relatively low calcium intake compared to Western countries.
Methods
The Health Examinees (HEXA) Study, large-scale genomic community-based prospective cohort study was designed to identify the general characteristics of major chronic disease in Korean. Participants in this analysis consisted with 135,230 participants aged 40-69 years recruited between 2004 and 2013. The calcium intake level was categories by Dietary Reference Intakes for Koreans (KDRIs). Cox proportional hazards regression model was used to estimate hazard ratio (HR) and corresponding 95% confidence intervals (CI) for colorectal cancer risk adjusting for potential confounders.
Results
Median energy-adjusted calcium intake was 385.5mg/day in men and 420.2mg/day in women. In the multivariate-adjusted model, compared with the group consumed less than the recommended intake of calcium, the group consumed more than the recommended intake of calcium showed a marginally significant reduction in the risk of colorectal cancer in women. (HR = 0.62, 95% CI: 0.38-1.02). But, among men, no significant association were observed between the dietary calcium intake and colorectal cancer risk (HR = 0.88, 95% CI: 0.56-1.37).
Conclusions
Korean women who adhere to the recommended intake of calcium showed a reduced risk of colorectal cancer.
Clinical trial identification
Editorial acknowledgement
Legal entity responsible for the study
The authors.
Funding
The National Research Foundation of Korea, No. 2017R1A2B4009233.
Disclosure
All authors have declared no conflicts of interest.
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