title: Fetal radius length: a critical evaluation of race as a factor in gestational age assessment.
abstract: Growth of the fetal radius was examined ultrasonographically in a prospective cross-sectional study of 290 white and 63 black patients between 12 and 43 weeks' gestation. The mean of radius length and 95% predictive intervals were calculated for each week. The most efficient description of the data was given by a simple log-linear model. The slopes for the white and black study groups estimated were distinctly different. Consequently, a single equation was estimated that considers race when assessing gestational age from radius length.
authors.affiliation: Department of Obstetrics and Gynecology, University of Pittsburgh Health System, Magee-Womens Hospital, PA 15213.
authors.forename: L M
authors.initials: LM
authors.lastname: Hill
authors.forename: D
authors.initials: D
authors.lastname: Guzick
authors.forename: M L
authors.initials: ML
authors.lastname: Thomas
authors.forename: J K
authors.initials: JK
authors.lastname: Fries
mesh_terms: D005260:Female; D005333:Fetus / Q000033:anatomy & histology*; D005865:Gestational Age; D006801:Humans; D008954:Models, Biological; D011247:Pregnancy; D044469:Racial Groups; D011884:Radius / Q000196:embryology*; D014463:Ultrasonography