Risk factors for obesity in adulthood among survivors of childhood cancer

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Delacourt, Laurène | Allodji, Rodrigue S. | Chappat, Juliette | Haddy, Nadia | El-Fayech, Chiraz | Demoor-Goldschmidt, Charlotte | Journy, Neige M.Y. | Bolle, Stéphanie L.E. | Thomas-Teinturier, Cécile | Zidane, Monia | Rubino, Carolé | Veres, Cristina | Vu-Bezin, Giao | Berchery, Delphine | Pluchart, Claire | Bondiau, Pierre Yves | Dumas, Agnès | Bougas, Nicolas | Grill, Jacques | Dufour, Christelle | Fresneau, Brice C. | Pacquement, Hélène D. | Diallo, Ibrahima | Doz, François F. | de Vathaire, Florent

Edité par CCSD ; Wiley -

International audience. Objective: The aim of this study was to identify risk factors for obesity in childhood cancer survivors (CCSs). Methods: The study included 3199 patients of the French Childhood Cancer Survivor Study cohort, with 303 patients with obesity who had returned the self-questionnaire. Analyses were adjusted for social deprivation index and sex. Results: CCSs were less likely to have obesity (9.5%; 95% CI: 8.5%–10.5%) than expected from the general French population rates (12.5%; p = 0.0001). Nevertheless, brain tumor survivors were significantly more likely to develop obesity than the general French population (p = 0.0001). Compared with patients who did not receive radiotherapy to the pituitary gland, those who received a dose >5 Gy had an increased risk of obesity: relative risk 1.9 (95% CI: 1.2–3.1), 2.5 (95% CI: 1.7–3.7), and 2.6 (95% CI: 1.6–4.3), respectively, for participants with 6 to 20 Gy, 20 to 40 Gy, and ≥40 Gy of radiation. Etoposide administration significantly increased the risk of obesity (relative risk 1.7; 95% CI: 1.1–2.6). High social deprivation index was also a risk factor, just like BMI at diagnosis. Conclusions: Long-term follow-up of CCSs should include weight follow-up during adulthood.

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