Abstract
Purpose
Chronic inflammation is thought to initiate or promote differentiated thyroid cancer (DTC) and previous studies have shown that diet can modulate this inflammatory process. We aimed to evaluate the association of several dietary scores reflecting the inflammatory potential of the diet with DTC risk.
Methods
Within the EPIC cohort, 450,063 participants were followed during a mean period of 14 years, and 712 newly incident DTC cases were identified. Associations between four dietary inflammatory scores [the dietary inflammatory index (DII®) and two energy-adjusted derivatives (the E-DIIr and the E-DIId), and the Inflammatory Score of the Diet (ISD)] and DTC risk were evaluated in the EPIC cohort using multivariable Cox regression models.
Results
Positive associations were observed between DTC risk and the DIIs (HR for 1 SD increase in DII: 1.11, 95%CI: 1.01, 1.23, similar results for its derivatives), but not with the ISD (HR for 1 SD increase: 1.04, 95% CI 0.93, 1.16).
Conclusion
Diet-associated inflammation, as estimated by the DII and its derivatives, was weakly positively associated with DTC risk in a European adult population. These results suggesting that diet-associated inflammation acts in the etiology of DTC need to be validated in independent studies.

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EPIC data and biospecimens are available for investigators who seek to answer important questions on health and disease in the context of research projects that are consistent with the legal and ethical standard practices of IARC/WHO and the EPIC Centers. The primary responsibility for accessing the data obtained in the frame of the present publication belongs to the EPIC centers that provided them. The use of a random sample of anonymized data from the EPIC study can be requested by contacting epic@iarc.fr. The request will then be passed on to members of the EPIC Steering Committee for deliberation.
Abbreviations
- BMI:
-
Body mass index
- CI:
-
Confidence interval
- CRP:
-
C-reactive protein
- DII:
-
Dietary inflammatory index
- DTC:
-
Differentiated thyroid cancer
- E-DIId :
-
Dietary inflammatory index adjusted on energy intakes using the density method
- E-DIIr :
-
Dietary inflammatory index adjusted on energy intakes using the residual method
- EPIC:
-
European Prospective Investigation into Cancer and Nutrition
- FFQ:
-
Food frequency questionnaire
- HR:
-
Hazard ratio
- IARC:
-
International Agency for Research on Cancer
- IL:
-
Interleukin
- ISD:
-
Inflammatory score of the diet
- SD:
-
Standard deviation
- TNF:
-
Tumor necrosis factor
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Acknowledgements
The authors thank all participants in the EPIC cohort for their invaluable contribution to the study. The authors also thank Bertrand Hémon (IARC) for his precious help with the EPIC database. We thank the National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands, for their contribution to, and ongoing support of, the EPIC Study. We acknowledge the use of data and biological samples from the EPIC-Oxford cohort, PI Tim Key, from the EPIC-Utrecht cohort, PI Roel Vermeulen, and from the EPIC-Asturias cohort, PI Ramón Quirós. We thank CERCA Program/Generalitat de Catalunya for the institutional support to IDIBELL. RZ-R and we would like to thank the “Miguel Servet” program (CPII20/00009) from the Institute of Health Carlos III (Spain) and the European Social Fund (ESF).
Disclaimer: Where authors are identified as personnel of the International Agency for Research on Cancer/World Health Organization, the authors alone are responsible for the views expressed in this article and they do not necessarily represent the decisions, policy or views of the International Agency for Research on Cancer/World Health Organization.
Funding
This work was supported by the Association pour la Recherche sur le Cancer (ARC) (Grant RF20180207126). The funders had no role in the design, analysis, or writing of this article. The coordination of EPIC is financially supported by the International Agency for Research on Cancer (IARC) and also by the Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, which has additional infrastructure support provided by the NIHR Imperial Biomedical Research Center (BRC). The national cohorts are supported by the following: Danish Cancer Society(Denmark); Ligue Contre le Cancer, Institut Gustave Roussy, Mutuelle Générale de l’Education Nationale, Institut National de la Santé et de la Recherche Médicale (INSERM), Agence Nationale pour la Recherche (ANR-10-COHO-0006) within the Investissement d’Avenir program, Ministère de l’enseignement supérieur, de la recherche et de l’innovation (MESRI, grant number 2103 586016) (France); German Cancer Aid, German Cancer Research Center (DKFZ), German Institute of Human Nutrition Potsdam Rehbruecke (DIfE), Federal Ministry of Education and Research (BMBF) (Germany); Associazione Italiana per la Ricerca sul Cancro-AIRC-Italy, Compagnia di San Paolo and National Research Council(Italy); Dutch Ministry of Public Health, Welfare and Sports (VWS), Netherlands Cancer Registry(NKR), LK Research Funds, Dutch Prevention Funds, Dutch ZON (Zorg Onderzoek Nederland),World Cancer Research Fund (WCRF), Statistics Netherlands (The Netherlands); Health Research Fund (FIS)—Instituto de Salud Carlos III (ISCIII), Regional Governments of Andalucía, Asturias, Basque Country, Murcia and Navarra, and the Catalan Institute of Oncology (Spain); Swedish Cancer Society, Swedish Research Council and County Councils of Skåne and Västerbotten (Sweden);Cancer Research UK (14136 to EPIC-Norfolk; C8221/A29017 to EPIC-Oxford), Medical Research Council (1000143 to EPIC-Norfolk; MR/M012190/1 to EPIC-Oxford), (UK). The EPIC-Norfolk study (https://doi.org/10.22025/2019.10.105.00004) has received funding from the Medical Research Council (MR/N003284/1, MC-UU_12015/1 and MC_UU_00006/1) and Cancer Research UK (C864/A14136). We are grateful to all the participants who have been part of the project and to the many members of the study teams at the University of Cambridge who have enabled this research.
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The author’s contribution were as follows: MCBR and TT coordinated the project. LL, NL, LD, SR, MCBR and TT designed and conducted the research; NS and JRH designed the DII; AA designed the ISD; LL performed the statistical analyses; NL, MCBR and TT supervised the statistical analyses; LL, NS, MCBR and TT interpreted the results and drafted the manuscript. All authors reviewed the manuscript and approved the final version of the paper.
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Dr. Marie-Christine Boutron-Ruault declares the following two sponsored conferences outside the present work as: MAYOLI-SPINDLER: 03/07/2020–30/07/2020 Symposium: Pancreatology in practice in 2020 e-JFHOD 2020 Conference « Why do I see more and more pancreatic cancers?» GILEAD 04/12/2020–04/12/2020- e-conference Weight gain and HIV infection in 2020. Dr. James R. Hébert owns controlling interest in Connecting Health Innovations LLC (CHI), a company that has licensed the right to his invention of the dietary inflammatory index (DII®) from the University of South Carolina in order to develop computer and smart phone applications for patient counseling and dietary intervention in clinical settings. Dr. Nitin Shivappa is an employee of CHI. The subject matter of this paper will not have any direct bearing on that work, nor has that activity exerted any influence on this project.
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The study was conducted according to the guidelines of the Declaration of Helsinki. Approval for the EPIC study was obtained from the ethical review boards of the International Agency for Research on Cancer (IARC) and all national recruitment institutions. Informed consent was obtained from all EPIC participants.
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Lécuyer, L., Laouali, N., Dossus, L. et al. Inflammatory potential of the diet and association with risk of differentiated thyroid cancer in the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort. Eur J Nutr 61, 3625–3635 (2022). https://doi.org/10.1007/s00394-022-02897-w
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DOI: https://doi.org/10.1007/s00394-022-02897-w


