Measures Allmeasurementsforweight,lengthor height, and head circumference (HC) recordedbeforeJanuary31,2010,were obtained from the electronic medical record. Attained growth z scores for each parameter (aswell asweight-forlength were determined for the World Health Organization (WHO) 2006 growth standard by using data from the WHO Anthro macro.10 Growth parameters that were determined likely to be nonrepresentative of actual growth based on the deviation of the recorded value from inverse distance-weighted means of the subject’s growth parameters were excluded from analysis; values that were extreme but consistent with a subjects ’ other growth parameters were included.