Fig. 3From: Validity of gestational age estimates by last menstrual period and neonatal examination compared to ultrasound in VietnamBland-Altman plots depicting difference between (a) last menstrual period (LMP) and ultrasound estimates of gestational age or (b) Farr examination and ultrasound estimates of gestational age, plotted against the average of the two methods. Solid line indicates mean difference and dotted line indicates Bland-Altman 95% Limits of Agreement (LOA). Positive y-values indicate overestimation by (a) LMP estimates or (b) Farr estimates compared to ultrasound Back to article page