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1 "Carotenoids"
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Brief Communication
Reinterpretation of the results of a pooled analysis of dietary carotenoid intake and breast cancer risk by using the interval collapsing method
Jong-Myon Bae
Epidemiol Health. 2016;38:e2016024.   Published online June 2, 2016
DOI: https://doi.org/10.4178/epih.e2016024
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  • 9 Web of Science
  • 11 Crossref
AbstractAbstract AbstractSummary PDFSupplementary Material
Abstract
OBJECTIVES
A pooled analysis of 18 prospective cohort studies reported in 2012 for evaluating carotenoid intakes and breast cancer risk defined by estrogen receptor (ER) and progesterone receptor (PR) statuses by using the “highest versus lowest intake” method (HLM). By applying the interval collapsing method (ICM) to maximize the use of the estimated information, we reevaluated the results of the previous analysis in order to reinterpret the inferences made.
METHODS
In order to estimate the summary effect size (sES) and its 95% confidence interval (CI), meta-analyses with the random-effects model were conducted for adjusted relative risks and their 95% CI from the second to the fifth interval according to five kinds of carotenoids and ER/PR status.
RESULTS
The following new findings were identified: α-Carotene and β-cryptoxanthin have protective effects on overall breast cancer. All five kinds of carotenoids showed protective effects on ER− breast cancer. β-Carotene level increased the risk of ER+ or ER+/PR+ breast cancer. α-Carotene, β-carotene, lutein/zeaxanthin, and lycopene showed a protective effect on ER−/PR+ or ER−/PR− breast cancer.
CONCLUSIONS
The new facts support the hypothesis that carotenoids that show anticancer effects with anti-oxygen function might reduce the risk of ER− breast cancer. Based on the new facts, the modification of the effects of α-carotene, β-carotene, and β-cryptoxanthin should be evaluated according to PR and ER statuses.
Summary
Korean summary
Carotenoids 가 항암기전이 있다면 steroid hormone에 무관한 estrogen receptor negative (ER-) 혹은 progesterone receptor negative (PR-) 유방암의 발생을 억제할 것이란 가설에 따라, 18개의 코호트에 대한 pooled analysis 결과가 2012년도에 발표되었다. 이를 재분석한 결과, 5 종류의 carotenoids 모두 ER- 유방암 억제하는 것을 확인하였다.

Citations

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