Current algorithms to evaluate gestational age (GA) during pregnancy rely on hospital coding at delivery and are not applicable to non-live births. We developed an algorithm using fertility procedures and fertility tests, without relying on delivery coding, to develop a novel GA algorithm in live-births and stillbirths.
Three pregnancy cohorts were identified from 16 health-plans in the Sentinel System: 1) hospital admissions for live-birth, 2) hospital admissions for stillbirth, and 3) medical chart-confirmed stillbirths. Fertility procedures and prenatal tests, recommended within specific GA windows were evaluated for inclusion in our GA algorithm. Our GA algorithm was developed against a validated delivery-based GA algorithm in live-births, implemented within a sample of chart-confirmed stillbirths, and compared to national estimates of GA at stillbirth.
Lockwood Taylor, Steven T. Bird, Danijela Stojanovic, Sengwee Toh, Judith C. Maro, Elnara Fazio-Eynullayeva, Andrew B. Petrone, Rajani Rajbhandari, Susan E. Andrade, Kevin Haynes, Cheryl N. McMahill-Walraven, Connie M. Trinacty, Mayura Shinde, Jennifer G. Lyons