Effects of Selective Exclusion of Patients on Preterm Birth Test Performance

Department of Epidemiology & Biostatistics, University of California, San Francisco, School of Medicine, and the UCSF California Preterm Birth Initiative, San Francisco, California

Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Francisco, School of Medicine, and the UCSF California Preterm Birth Initiative, San Francisco, California

Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa

Financial Disclosure Laura L. Jelliffe-Pawlowski reports that she received support for this work from the UCSF California Preterm Birth Initiative (PTBI-CA) for this work and the March of Dimes Prematurity Research Center at Stanford University. Larry Rand reports that money was paid to his institution from and The Bill and Melinda Gates Foundation. Kelli K. Ryckman reports receiving funds from UCSF, Bill and Melinda Gates Foundation, the NIH and the HRSA. The other author did not report any potential conflicts of interest.