Prevalence and determinants of metabolic syndrome in 2338 childhood cancer survivors: A Dutch Childhood Cancer Survivor LATER 2 study.
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BACKGROUND: Because the occurrence of metabolic syndrome (MetS) might contribute to childhood cancer survivor's excess risk of cardiovascular disease, the authors assessed the prevalence and determinants of MetS in the Dutch Childhood Cancer Survivor Study (DCCSS-LATER2) cohort. METHODS: In total, 2338 adult childhood cancer survivors (CCS) were cross-sectionally assessed for the prevalence of MetS, using the Lifelines cohort (N = 132,226 adults without a history of cancer) as references. The prevalence of MetS was clinically assessed using existing classifications, as well as an alternative method using dual-energy x-ray absorptiometry fat% instead of waist circumference to define abdominal adiposity. Logistic regression models, adjusted for age and sex, were used to investigate the association between the presence of MetS and both cohorts. Demographic, lifestyle, and treatment determinants of MetS were identified through multivariable logistic regression. RESULTS: The survivor cohort (median age, 34.7 years, median follow-up time, 27.1 years) showed increased adjusted odds ratio (aOR) for MetS (modified National Cholesterol Education Program Adult Treatment Panel III criteria), as compared to the reference cohort (aOR, 2.07; 95% confidence interval [CI], 1.85-2.32). Compared to these criteria, the alternative method identified 57 additional survivors with MetS (395 of 2070 [19.1%] vs. 452 of 1960 [23.1%], respectively). Age (odds ratio [OR], 1.07; 95% CI, 1.04-1.10, per year increase), smoking (OR, 1.46; 95% CI, 1.04-2.04), low physical activity (OR, 1.48; 95% CI, 1.05-2.09), abdominal radiotherapy (OR, 2.13; 95% CI, 1.01-4.31; >30 Gy), cranial radiotherapy (OR, 2.89; 95% CI, 1.67-4.96; 1-25 Gy; and OR, 2.44; 95% CI, 1.30-4.47; >25 Gy), total body irradiation (OR, 6.17; 95% CI, 3.20-11.76), and underlying central nervous system tumor (OR, 1.78; 95% CI, 1.21-2.60) were associated with MetS. CONCLUSION: The high risk of MetS in CCS, combined with several potential modifiable factors, underscores the need for timely identification and intervention strategies to mitigate the long-term cardiovascular risks in CCS.