Evidence map›Paper›PMID 30668630›Full record

ArticleThe American journal of clinical nutrition2019

Antioxidant supplementation and breast cancer prognosis in postmenopausal women undergoing chemotherapy and radiation therapy.

Audrey Y Jung, Xinting Cai, Kathrin Thoene, Nadia Obi, Stefanie Jaskulski, Sabine Behrens, Dieter Flesch-Janys, Jenny Chang-Claude

Abstract read
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In one paragraph

Article in The American journal of clinical nutrition, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

40 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Use of dietary supplements and over-the-counter products among adults with a self-reported history of cancer in Poland.Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer · 2026
    Article
  5. Review
  6. ROS and Antioxidants: Prospective Therapeutic Options in Cancer.Journal of cellular and molecular medicine · 2026
    Article
  7. Review
  8. Article
  9. Article
  10. Article
  11. Review
  12. High-dose vitamin C as a metabolic treatment of cancer: a new dimension in the era of adjuvant and intensive therapy.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2025
    Review
  13. Breast cancer: pathogenesis and treatments.Signal transduction and targeted therapy · 2025
    Review
  14. Article
  15. Article
  16. Review
  17. Article
  18. Article
  19. Exploring the Antioxidant Potential ofAntioxidants (Basel, Switzerland) · 2023
    Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors.

Audrey Y JungDivision of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany.
Xinting CaiDivision of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany.
Kathrin ThoeneCancer Epidemiology Group, University Cancer Center Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Nadia ObiInstitute for Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Stefanie JaskulskiDivision of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany.
Sabine BehrensDivision of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany.
Dieter Flesch-JanysInstitute for Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Jenny Chang-ClaudeDivision of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: There is a paucity of information on the prevalence of dietary supplement use in breast cancer survivors. Only a few studies have examined the impact of dietary supplements, particularly antioxidants, on breast cancer prognosis and the results are inconclusive. Objective: We examined pre- and postdiagnosis use of supplements in postmenopausal breast cancer survivors in Germany and investigated associations between postdiagnosis use of antioxidants and other supplements, and prognosis (total and breast cancer mortality, and recurrence-free survival) both overall and in women who received chemotherapy and radiation therapy. Design: Data from 2223 postmenopausal women diagnosed with nonmetastatic breast cancer from the population-based Mamma Carcinoma Risk Factor Investigation (MARIE) study were used. Women were interviewed at recruitment in 2002-2005 and again in 2009 and followed-up until 30 June 2015. Multivariate Cox regression analysis was used to estimate HRs and corresponding 95% CIs. Results: Pre- and postdiagnosis supplement use was reported by 36% and 45% of the women, respectively. There were 240 deaths (134 from breast cancer) and 200 breast cancer recurrences after a median follow-up time of 6.0 y after the 2009 re-interview. After adjusting for relevant confounders, concurrent antioxidant use with chemotherapy or radiation therapy among 1940 women was associated with increased risk of total mortality (HR: 1.64; 95% CI: 1.01, 2.66) and worsened recurrence-free survival (HR: 1.84; 95% CI: 1.26, 2.68). Overall postdiagnosis supplement use was not associated with breast cancer prognosis. Conclusions: Antioxidant use during chemotherapy or radiation therapy was associated with worsened breast cancer prognosis in postmenopausal women. There was no overall association between postdiagnosis supplement use and breast cancer prognosis. Results from our study align with the current recommendation to possibly avoid the use of antioxidants during chemotherapy or radiation therapy.

Indexed as

Disease-Free SurvivalAgedAntioxidantsBreast NeoplasmsDietary SupplementsFemaleGermanyHumansMiddle AgedNeoplasm Recurrence, LocalPostmenopausePrognosisTreatment OutcomeAntioxidants

Identifiers

PMID30668630

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.