PHILADELPHIA (April 20, 2016) - During the past two decades, vitamin D status, defined as serum concentration of 25-hydroxyvitamin D, has emerged as a predictor of key clinical outcomes including bone health, glucose metabolism, cardiovascular health, immune health and survival. Now, a University of Pennsylvania School of Nursing (Penn Nursing) team, including senior author Terri Lipman, PhD, CRNP, FAAN, the Miriam Stirl Endowed Term Professor of Nutrition, Professor of Nursing of Children and Assistant Dean for Community Engagement, has examined the association between 25-hydroxyvitamin D and diabetes control in children and adolescents with type 1 diabetes.