Correction of Systematic Bias in Ultrasound Dating in Studies of Small-for-Gestational-Age Birth: An Example From the Iowa Health in Pregnancy Study
American Journal of Epidemiology, 08/20/2012
Harland KK et al. – With adjustment for maternal age, smoking, and first–trimester vaginal bleeding, standard guidelines for adjudicating differences in ultrasound and last menstrual period (LMP) dating underestimated SGA birth by 12.9% and overestimated preterm delivery by 8.7%. This methodological approach can be applied by researchers using different study populations in similar research contexts.