Identifying Cardiovascular Risk in Survivors of Childhood Leukaemia Treated with Haematopoietic Stem Cell Transplantation and Total Body Irradiation

Background: Survivors of childhood with haematopoietic stem cell transplantation and total body irradiation (HSCT/TBI) have an increased cardiometabolic risk without overt obesity. Aim: To describe cardiometabolic risk in HSCT/TBI survivors and identify anthropometric measurements of adiposity representative of cardiometabolic risks in HSCT/TBI survivors. Method: Childhood leukaemia survivors treated with HSCT/TBI (n = 21, 11 males) were compared with chemotherapy-only (n = 31) and obese non-leukaemic controls (n = 30). All subjects (16–26 years) had blood pressure and auxological measurements (body mass index, waist and hip circumferences) and blood tests (triglycerides, high-density lipoprotein [HDL], and oral glucose tolerance tests). Central adiposity was defined as either increased waist circumference (WC), waist-to-height ratio (WHtR) (#x3e;0.5), or waist-to-hip ratio (WHR) (males #x3e;0.9, females #x3e;0.85). Results: HSCT/TBI survivors showed higher prevalence of hypertriglyceridaemia than both comparison groups and higher prevalence of reduced HDL compared to the chemotherapy-only group. The WHR reported a higher prevalence of increased adiposity in HSCT/TBI survivors compared with WC and WHtR, but such differences were not observed in the other groups. In the HSCT survivors, WHR had the highest number of significant associations with metabolic risk factors, and metabolic risks worsen with time elapsed since primary treatment. Conclusions: HSCT/TBI survivors have high cardiometabolic risk that is not sufficiently reflected by WC alone. WHR is a useful surrogate marker for increased cardiometabolic risk in HSCT/TBI survivors.

Horm Res Paediatr

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