1. An Observational Study of the Equivalence of Age and Duration of Diabetes to Glycemic Control Relative to the Risk of Complications in the Combined Cohorts of the DCCT/EDIC Study
- Author
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Ionut Bebu, Pearl G. Lee, Barbara H. Braffett, David S. Schade, William I. Sivitz, William H. Herman, Gayle M. Lorenzi, Victoria R. Trapani, Rodica Pop-Busui, John M. Lachin, Amisha Wallia, and John I. Malone
- Subjects
Adult ,Blood Glucose ,Male ,Risk ,Research design ,medicine.medical_specialty ,Pediatrics ,Time Factors ,Adolescent ,endocrine system diseases ,Endocrinology, Diabetes and Metabolism ,030209 endocrinology & metabolism ,Glycemic Control ,Cohort Studies ,Diabetes Complications ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Risk Factors ,Diabetes mellitus ,Epidemiology ,Internal Medicine ,medicine ,Humans ,030212 general & internal medicine ,Age of Onset ,Epidemiology/Health Services Research ,Child ,Glycemic ,Glycated Hemoglobin ,Advanced and Specialized Nursing ,Type 1 diabetes ,business.industry ,Proportional hazards model ,Age Factors ,nutritional and metabolic diseases ,Middle Aged ,medicine.disease ,Diabetes Mellitus, Type 1 ,Child, Preschool ,Cohort ,Female ,Observational study ,business - Abstract
OBJECTIVE This epidemiological analysis of the pooled Diabetes Control and Complications Trial/Epidemiology of Diabetes Interventions and Complications (DCCT/EDIC) cohort describes the equivalence of a 1-percentage point increase in HbA1c (such as from 7% to 8%) and years of additional age or duration of type 1 diabetes (T1D) relative to the risk of complications. RESEARCH DESIGN AND METHODS Separate Cox proportional hazards models determined the number of additional years of age and/or duration of T1D that would result in the same increase in risk of microvascular (retinopathy, nephropathy, and neuropathy) and cardiovascular complications and mortality as a 1-percentage point increase in HbA1c. RESULTS The risk of any cardiovascular disease associated with a 1-percentage point increase in HbA1c was equivalent to the risk associated with 4.3 (95% CI 2.7–5.9) additional years of age or 5.6 (95% CI 2.7–6.5) additional years’ duration of T1D. The risk of estimated glomerular filtration rate CONCLUSIONS Our results help evaluate the impact of glycemia on advanced complications in a way that may be more interpretable to health care providers and individuals with T1D.
- Published
- 2020
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