External Validation Study of First Trimester Obstetric Prediction Models (Expect Study I): Research Protocol and Population Characteristics

Linda Jacqueline Elisabeth Meertens   ¹ , MD, MSc ;   Hubertina CJ Scheepers   ² , MD, PhD ;   Raymond G De Vries   ^{3, 4, 5} , PhD ;   Carmen D Dirksen   ⁶ , PhD ;   Irene Korstjens   ⁵ , PhD ;   Antonius LM Mulder   ⁷ , MD, PhD ;   Marianne J Nieuwenhuijze   ⁵ , RM, PhD ;   Jan G Nijhuis   ² , MD, PhD ;   Marc EA Spaanderman   ² , MD, PhD ;   Luc JM Smits   ¹ , PhD

¹ Care and Public Health Research Institute (CAPHRI), Department of Epidemiology, Maastricht University, Maastricht, Netherlands

² School for Oncology and Developmental Biology (GROW), Department of Obstetrics and Gynecology, Maastricht University Medical Centre, Maastricht, Netherlands

³ Center for Bioethics and Social Sciences in Medicine, University of Michigan Medical School, Ann Arbor, MI, United States

⁴ Care and Public Health Research Institute (CAPHRI), Maastricht University, Maastricht, Netherlands

⁵ Research Centre for Midwifery Science, Faculty of Health, Zuyd University, Maastricht, Netherlands

⁶ Care and Public Health Research Institute (CAPHRI), Department of Clinical Epidemiology and Medical Technology Assessment (KEMTA), Maastricht University Medical Centre, Maastricht, Netherlands

⁷ School for Oncology and Developmental Biology (GROW), Department of Pediatrics, Maastricht University Medical Centre, Maastricht, Netherlands