Undertreatment of cardiovascular risk factors in the type 1 diabetes exchange clinic network (United States) and the prospective diabetes follow-up (Germany/Austria) registries. Thresholds for abnormal lipid profile were LDL cholesterol of more than 3.4 mmol/L, and/or total cholesterol of more than 5.2 mmol/L, and/or HDL cholesterol of less than 0.9 mmol/L on at least one occasion. Treatment of an abnormal lipid profile: 1588/4728 (33.6%) participants who were aged 11 years or older at their last visit and who had lipid assessments during follow-up met the criteria for an abnormal lipid profile (Table 1). Keywords: cardiovascular disease; cohort study; type 1 diabetes EN cardiovascular disease cohort study type 1 diabetes 354 361 8 01/11/22 20220201 NES 220201 INTRODUCTION Cardiovascular disease is the primary cause of increased morbidity and reduced longevity in type 1 diabetes (TID).1,2 Children who develop T1D before the age of 10 years are particularly at risk of cardiovascular disease in adult life.3 Monitoring of cardiovascular risk factors during childhood and adolescence is recognized as an essential part of care. [Extracted from the article]