Accuracy of preterm infant weight gain velocity calculations vary depending on method used and infant age at time of measurement

BACKGROUND: We examined preterm infants’ weight gain velocity (WGV) to determine how much calculation methods influences actual WGV during the first 28 days of life. METHODS: WGV methods (Average 2-point, Exponential 2-point, Early 1-point, and Daily) were calculated weekly and for various start tim...