Analysis of the NICHD Vitamin D Pregnancy Cohort on a Per-Protocol vs. Intent-to-Treat Basis: The Effect of Adherence on Trial Results

Michael J Abercrombie, Judith R Shary, Myla D Ebeling, Bruce W Hollis and Carol L Wagner^*

Medical University of South Carolina, Charleston, USA

^*Corresponding Author: Carol L Wagner, MD, Shawn Jenkins Children’s Hospital, Medical University of South Carolina, 165 Ashley Avenue, MSC 917, Charleston, SC 29425, USA, Tel: (843) 792-2112, Fax: (843) 792-8801