Evidence map›Paper›PMID 34228225›Full record

ArticleJournal of cancer research and clinical oncology2022

Complementary and alternative medicine (CAM) supplements in cancer outpatients: analyses of usage and of interaction risks with cancer treatment.

Clemens P J G Wolf, Tobias Rachow, Thomas Ernst, Andreas Hochhaus, Bijan Zomorodbakhsch, Susan Foller, Matthias Rengsberger, Michael Hartmann, Jutta Huebner

Open access · hybridAbstract read
In one paragraph

Article in Journal of cancer research and clinical oncology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 1 pooled it
7.9field-weighted citation impact, top 3% of its field
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

27 citing papers in PubMed, 1 synthesis or guideline pooled it, 41 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Trial
  4. Article
  5. Diagnosis, care pathways, and Complementary and Alternative Medicine (CAM) use among digestive cancer patients in Benin: a qualitative study.Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer · 2026
    Article
  6. Article
  7. Article
  8. Article
  9. [Integration of complementary medicine in uro-oncology].Urologie (Heidelberg, Germany) · 2025
    Review
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Cancer patients' behaviors and attitudes toward natural health products.BMC complementary medicine and therapies · 2023
    Article
  17. Article
  18. Article
  19. Article
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 3 institutions in 1 country.

Clemens P J G WolfKlinik für Innere Medizin II, Hämatologie und Internistische Onkologie, Universitätsklinikum Jena, Am Klinikum 1, 07747, Jena, Germany. clemens.wolf@uni-jena.de.ORCID http://orcid.org/0000-0002-5429-2008
Tobias RachowKlinik für Innere Medizin II, Hämatologie und Internistische Onkologie, Pneumologie, Universitätsklinikum Jena, Am Klinikum 1, 07747, Jena, Germany.
Thomas ErnstKlinik für Innere Medizin II, Hämatologie und Internistische Onkologie, Konservative Tagesklinik des UniversitätsTumorCentrums (UTC), Universitätsklinikum Jena, Am Klinikum 1, 07747, Jena, Germany.
Andreas HochhausKlinik für Innere Medizin II, Hämatologie und Internistische Onkologie, Universitätsklinikum Jena, Am Klinikum 1, 07747, Jena, Germany.
Bijan ZomorodbakhschOnkologische Kooperation Harz, Kösliner Straße 14, 38642, Goslar, Germany.
Susan FollerKlinik für Urologie, Universitätsklinikum Jena, Am Klinikum 1, 07747, Jena, Germany.
Matthias RengsbergerKlinik und Poliklinik für Frauenheilkunde und Fortpflanzungsmedizin, Universitätsklinikum Jena, Am Klinikum 1, 07747, Jena, Germany.
Michael HartmannApotheke des Universitätsklinikums, Universitätsklinikum Jena, Am Klinikum 1, 07747, Jena, Germany.
Jutta HuebnerKlinik für Innere Medizin II, Hämatologie und Internistische Onkologie, Integrative Onkologie, Universitätsklinikum Jena, Am Klinikum 1, 07747, Jena, Germany.
Jena University Hospital · DEKlinikum Magdeburg · DEKlinik und Poliklinik für Frauenheilkunde und Fortpflanzungsmedizin · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe aim of our study was to analyze the use of complementary and alternative medicine (CAM) supplements, identify possible predictors, and analyze and compile potential interactions of CAM supplements with conventional cancer therapy.

methodsWe included outpatient cancer patients treated at a German university hospital in March or April 2020. Information was obtained from questionnaires and patient records. CAM-drug interactions were identified based on literature research for each active ingredient of the supplements consumed by the patients.

results37.4% of a total of 115 patients consumed CAM supplements. Potential interactions with conventional cancer treatment were identified in 51.2% of these patients. All types of CAM supplements were revealed to be a potential source for interactions: vitamins, minerals, food and plant extracts, and other processed CAM substances. Younger age (< 62 years) (p = 0.020, φc = 0.229) and duration of individual cancer history of more than 1 year (p = 0.006, φc = 0.264) were associated with increased likelihood of CAM supplement use. A wide range of different CAM supplement interactions were reviewed: effects of antioxidants, cytochrome (CYP) interactions, and specific agonistic or antagonistic effects with cancer treatment.

conclusionThe interaction risks of conventional cancer therapy with over-the-counter CAM supplements seem to be underestimated. Supplements without medical indication, as well as overdoses, should be avoided, especially in cancer patients. To increase patient safety, physicians should address the risks of interactions in physician-patient communication, document the use of CAM supplements in patient records, and check for interactions.

Indexed as

Complementary TherapiesNeoplasmsDietary SupplementsHumansMiddle AgedOutpatientsVitaminsVitaminsCancer outpatientsCancer treatmentChemotherapyComplementary and alternative medicineDrug interactions

Identifiers

PMID34228225
PMCPMC9016053
OpenAlexW3181958123

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.