Two hundred four neonates, 25 to 42 weeks estimated gestational age (EGA), were measured on day 2 or 3 of life for upper mid-arm circumference (MAC) and head circumference. Regression analysis was used to construct standard curves for MAC versus EGA and mid-arm circumference/head circumference ratio (MAC/HC) versus EGA. Correlation coefficients were 0.93 for MAC versus EGA, and 0.84 for MAC/HC versus EGA. MAC, MAC/HC, and head circumference were also highly correlated with birth weight. These measurements may more accurately assess intrauterine growth and body proportionality at birth than weight, length, and head circumference.
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Upper mid-arm circumference and upper mid-arm circumference/head circumference ratio reference values have been developed for infants older than 3 months of age t-3 and for children. 4 Kanawati and McLaren 3 demonstrated that these measurements are indicative of protein-calorie nutritional status. Lack of normative data has precluded the use of either MAC measurements or the MAC/HC ratio in prematurely born infants. The potential usefulness of these measurements in premature and full-term infants is twofold: (1) identification of infants affected by aberrant Presented in part at the Annual Meeting of the American College of Nutrition, September 19, 1983. Supported in part by a grant from the Commonwealth of Pennsylvania Department of Health. Submitted for publication Nov. 26, 1984; accepted March 27, 1986. Reprint requests: Sharon R. Sasanow, M.A., R.D., Division of Gastroenterology and Nutrition, The Children's Hospital of Philadelphia, 34th Street & Civic Center Blvd., Philadelphia, PA 19104. *Formerly Sharon R. Moskowitz.
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