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Eur Thyroid J. 2016 Jul;5(2):132-8. doi: 10.1159/000445887. Epub 2016 May 21.

Recreational Physical Activity and Differentiated Thyroid Cancer Risk: A Pooled Analysis of Two Case-Control Studies.

European thyroid journal

Constance Xhaard, Juan J Lence-Anta, Yan Ren, Françoise Borson-Chazot, Geneviève Sassolas, Claire Schvartz, Marc Colonna, Brigitte Lacour, Arlette Danzon, Michel Velten, Enora Clero, Stéphane Maillard, Emilie Marrer, Laurent Bailly, Eugènia Mariné Barjoan, Martin Schlumberger, Jacques Orgiazzi, Elisabeth Adjadj, Celia M Pereda, Silvia Turcios, Milagros Velasco, Mae Chappe, Idalmis Infante, Marlene Bustillo, Anabel García, Sirced Salazar, Regla Rodriguez, Mohamed Amine Benadjaoud, Rosa M Ortiz, Carole Rubino, Florent de Vathaire

Affiliations

  1. U1018, Centre d'Epidémiologie et de Santé des Populations (CESP), Institut National de la Santé et de la Recherche Médicale (INSERM), Villejuif, France; Institut Gustave Roussy, Villejuif, France; Université Paris-Saclay, Villejuif, France.
  2. National Institute of Oncology and Radiobiology (INOR), Havana, Cuba.
  3. Groupement Hospitalier Lyon-Est, Hospices Civils de Lyon, Fédération d'Endocrinologie, Bron, France; Rhône-Alpes Thyroid Cancer Registry, Cancer Research Center of Lyon (UMR INSERM 1052, CNRS 5286), RTH Laennec Faculty of Medicine, University of Lyon, Lyon, France.
  4. Rhône-Alpes Thyroid Cancer Registry, Cancer Research Center of Lyon (UMR INSERM 1052, CNRS 5286), RTH Laennec Faculty of Medicine, University of Lyon, Lyon, France.
  5. Thyroid Cancer Registry of Champagne-Ardennes, Institut Jean Godinot, Reims, France.
  6. Cancer Registry of Isère, Meylan, France.
  7. U1018, Centre d'Epidémiologie et de Santé des Populations (CESP), Institut National de la Santé et de la Recherche Médicale (INSERM), Villejuif, France; French National Registry of Childhood Solid Tumours, CHU, Nancy, France.
  8. Cancer Registry of Doubs, EA 3181, Université de Franche-Comté, Besançon, France.
  9. Cancer Registry of Bas-Rhin, EA 3430, Faculty of Medicine, University of Strasbourg, Strasbourg, France.
  10. Cancer Registry of Haut-Rhin, Mulhouse Hospital, Mulhouse, France.
  11. Public Health Department, University Hospital Nice, Nice, France.
  12. Institut Gustave Roussy, Villejuif, France.
  13. Department of Endocrinology, Hospices Civils de Lyon, Lyon, France.
  14. U1018, Centre d'Epidémiologie et de Santé des Populations (CESP), Institut National de la Santé et de la Recherche Médicale (INSERM), Villejuif, France; Université Paris-Saclay, Villejuif, France.
  15. National Institute of Endocrinology, Havana, Cuba.
  16. Cuban Public Health Ministry, Havana, Cuba.

PMID: 27493888 PMCID: PMC4949366 DOI: 10.1159/000445887

Abstract

PURPOSE: Physical activity has been hypothesized to influence cancer occurrence through several mechanisms. To date, its relation with thyroid cancer risk has been examined in relatively few studies. We pooled 2 case-control studies conducted in Cuba and Eastern France to assess the relationship between self-reported practice of recreational physical activity since childhood and thyroid cancer risk.

METHODS: This pooled study included 1,008 cases of differentiated thyroid cancer (DTC) matched with 1,088 controls (age range 9-35 and 17-60 years in the French and Cuban studies, respectively). Risk factors associated with the practice of recreational physical activity were estimated using OR and 95% CI. Logistic regressions were stratified by age class, country, and gender and were adjusted for ethnic group, level of education, number of pregnancies for women, height, BMI, and smoking status.

RESULTS: Overall, the risk of thyroid cancer was slightly reduced among subjects who reported recreational physical activity (OR = 0.8; 95% CI 0.5-1.0). The weekly frequency (i.e. h/week) seems to be more relevant than the duration (years).

CONCLUSION: Long-term recreational physical activity, practiced since childhood, may reduce the DTC risk. However, the mechanisms whereby the DTC risk decreases are not yet entirely clear.

Keywords: Pooled case-control study; Recreational physical activity; Risk factors; Thyroid cancer

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