Low birth weight and intrauterine growth retardation in Filipino infants.

Low birth weight, prematurity, and intrauterine growth retardation represent important health tasks for neonates. Pregnancy outcome risk categories based on combinations of these variables and a measure of body proportions were developed and tested with respect to how well they predict poor growth during infancy. Data were collected during a prospective community-based survey of births representative of the Cebu region of the Philippines. In the sample of 2139 births for which there were available birth weight and gestational age data, 20% of infants were classified as growth retarded and 12% were low birth weight. Low birth weight, the more conservative category, was a better predictor of small infant size at 12 months of age than intrauterine growth retardation. Rohrer's index, which captures information about patterns of intrauterine growth, improves the positive predictive value of categories based either on intrauterine growth retardation or low birth weight. Infants who had an adequate Rohrer's index, ie, were well proportioned at birth, were smaller at 12 months of age than infants who had a low Rohrer's index, ie, had weight deficits relative to their lengths at birth. Important questions about the value of the intrauterine growth retardation classification are raised by the results.