Figure 4

ROC Curves of the different anthropometric parameters for birth weight <2000 g. a: ROC curve for chest circumference as a surrogate for birth weight less than 2000 g. b: ROC curve for occipitofrontal circumference as a surrogate for birth weight less than 2000 g. c: ROC curve for chest circumference + occipitofrontal circumference as a surrogate for birth weight less than 2000 g. d: ROC curve for chest circumference/occipitofronal circumference (ratio) as a surrogate for birth weight less than 2000 g.