Is first trimester vitamin D status in nulliparous women associated with pregnancy related hypertensive disorders? Britte van Weert, BSc (Registered Midwife), Denice van den Berg, BSc (Registered Midwife), E. Jessica Hrudey, MSc (Junior Researcher, Data Manager), Adriëtte J.J.M. Oostvogels, MSc (PhD Candidate), Esteriek de Miranda, PhD (Registered Midwife and Senior Researcher), Tanja G.M. Vrijkotte, PhD (Assistant Professor, Epidemiologist) Midwifery Volume 34, Pages 117-122 (March 2016) DOI: 10.1016/j.midw.2015.12.007 Copyright © 2016 The Authors Terms and Conditions
Fig. 1 Flowchart for study sample collection. *Sum of excluded data is greater than total excluded cases due to overlap in excluded variables. 25OHD=25-hydroxyvitamin D; ABCD=Amsterdam Born Children and their Development Study. Midwifery 2016 34, 117-122DOI: (10.1016/j.midw.2015.12.007) Copyright © 2016 The Authors Terms and Conditions