Prevalence and determinants of dyslipidemia in 2,338 Dutch childhood cancer survivors: a DCCS-LATER 2 Study.

Abstract

Childhood cancer survivors (CCS) face an increased risk of early cardiovascular disease. In our nationwide CCS cohort, we assessed the prevalence and determinants of dyslipidemia, a well-established risk factor for accelerated atherosclerosis and cardiovascular disease. Prevalence of dyslipidemia was cross-sectionally assessed in 2,338 adult CCS and compared to adults with no cancer history (Lifelines, n=132,226). Dyslipidemia was defined by multiple classifications as well as lipid abnormalities to investigate the impact on prevalence and determinants. Logistic regression models, adjusted for age, sex, and BMI, were used to assess the cohort effect on presence of dyslipidemia. Determinants of dyslipidemia were identified through multivariable logistic regression. CCS (median age 34.7y, median follow-up 27.1y) had significantly increased odds of dyslipidemia compared to the reference cohort according to all classifications (NCEP-ATP-III, WHO, EGIR, CTCAEv.4.03). In survivors without lipid-lowering agents (n=2,007), lipid abnormalities were present in 20.6% (triglycerides>1.7mmol/L), 30.3% (HDL-c<1.0/1.3mmol/L (male/female)), 29.9% (total cholesterol>5.2mmol/L), 7.3% (LDL-c>4.1mmol/L), and 7.7% (apolipoprotein-B>130mg/dl). Compared to references without lipid-lowering agents (n=126,631), survivors had increased odds of high triglycerides (aOR=1.89, 95%CI=1.68-2.13), low HDL-c (aOR=2.73, 95%CI=2.46-3.03), and high apolipoprotein-B (aOR=1.84, 95%CI=1.53-2.20). Sex, age, BMI, physical activity, abdominal/pelvic, cranial, and total body irradiation, alkylating agents, smoking, growth hormone deficiency, and diabetes mellitus were associated with (≥1 definition of) dyslipidemia in CCS. CCS are at increased risk of dyslipidemia, with various modifiable and non-modifiable determinants identified, underscoring the importance of survivor-specific risk assessment tools to control cardiovascular morbidity and mortality in this high-risk population.