Vitamin C and survival among women with breast cancer: A Meta-analysis

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Vitamin C and survival among women with breast cancer : A Meta-analysis

Harris, Holly R. (author): Karolinska Institutet

Orsini, Nicola (author): Karolinska Institutet

Wolk, Alicja (author): Karolinska Institutet

(creator_code:org_t)

ELSEVIER SCI LTD, 2014
2014
English.
In: European Journal of Cancer. - : ELSEVIER SCI LTD. - 0959-8049 .- 1879-0852. ; 50:7, s. 1223-1231

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; http://kipublication...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

Background: The association between dietary vitamin C intake and breast cancer survival is inconsistent and few studies have specifically examined vitamin C supplement use among women with breast cancer. The purpose of this study was to summarise results from prospective studies on the association between vitamin C supplement use and dietary vitamin C intake and breast cancer-specific mortality and total mortality. Methods: Studies were identified using the PubMed database through February 6, 2014 and by examining the references of retrieved articles. Prospective studies were included if they reported relative risks (RR) with 95% confidence intervals (95% CIs) for at least two categories or as a continuous exposure. Random-effects models were used to combine study-specific results. Results: The ten identified studies examined vitamin C supplement use (n = 6) and dietary vitamin C intake (n = 7) and included 17,696 breast cancer cases, 2791 total deaths, and 1558 breast cancer-specific deaths. The summary RR (95% CI) for post-diagnosis vitamin C supplement use was 0.81 (95% CI 0.72-0.91) for total mortality and 0.85 (95% CI 0.74-0.99) for breast cancer-specific mortality. The summary RR for a 100 mg per day increase in dietary vitamin C intake was 0.73 (95% CI 0.59-0.89) for total mortality and 0.78 (95% CI 0.64-0.94) for breast cancer-specific mortality. Conclusion: Results from this meta-analysis suggest that post-diagnosis vitamin C supplement use may be associated with a reduced risk of mortality. Dietary vitamin C intake was also statistically significantly associated with a reduced risk of total mortality and breast cancer-specific mortality. (C) 2014 Elsevier Ltd. All rights reserved.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Cancer och onkologi (hsv//swe)
MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Cancer and Oncology (hsv//eng)

Keyword

Vitamin C
Supplement use
Breast cancer
Mortality
Meta-analysis

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art (subject category)

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By the author/editor: Harris, Holly R.; Orsini, Nicola; Wolk, Alicja

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MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Cancer and Oncol ...

Articles in the publication: European Journal ...

By the university: Uppsala University; Karolinska Institutet

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