Razi Journal of Medical Sciences

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The determination of birth parameters is one of the first and main works in every newborn and composed of height, weight, head and chest circumference measurements. Because of the impression of social, economical,cultural differences in fetal growth and birth parameters, the determination of these parameters seems necessary in different groups of people. In this study in 1000 health newborns, these parameters was measured and matched by the standard NCHS. This is a cross-sectional study in 1000 healthy Iranian newborn that were born at Firoozabadi hospital in Tehran. The parameters of height, weight, head and chest circumference were measured by one pediatrician and by unique tools. Multiple longitudinal regression models has been used for the prediction anthropometric characteristics. Male/Female was 1/1. The boys’ means of weight and height were meaningfully higher than the girls’ (P=0.009, P=0.003). The means of weight and head circumference were meaningfully different by the NCHS reports and were less than those. The mean of girls’ height was meaningfully more than the NCHS, but the mean of boy’s height had no significant difference by the NCHS. For prediction of height, weight and head circumference by the results of this paper and by the regression methods, some models are offered. In this study we have meaningful difference between height, weight, head circumference of both newborn sexes by the NCHS standards, which are not clinically significant, but the role of some social, economical, maternal and placental factors are important in this difference and so more researches in our country and between different groups of people is necessary.

Keywords: 1) Newborn 2) Height 3) Weight 4) Head circumference 5) Chest circumference

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