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American Journal of Clinical Nutrition, Vol 9, 616-624, Copyright © 1961 by The American Society for Clinical Nutrition, Inc.

A Longitudinal Study of the Animal Protein Intake of Children from One to Eighteen Years of Age

BERTHA S. BURKE M.A.1, ROBERT B. REED PH.D.1, ANNA S. VAN DEN BERG M.S.1, and HAROLD C. STUART M.D.1

1 From the Department of Maternal and Child Health, Harvard School of Public Health, Boston, Massachusetts

The cross-sectional distributions of the animal protein intakes of sixty-four boys and sixty-one girls of the Maturity Series of this longitudinal research are described for the age period one to eighteen years. Wide variations in intake with age and sex are clearly shown. The average intakes are very similar for the two sexes in the preschool years. During the school years, especially the late school years, the boys displayed a high rate of increase compared to the girls. The boys' animal protein intakes were highest at eighteen years of age, when the average value was 76 gm. per day; the girls reached their maximum, 57 gm. per day, during the fifteen- to sixteen-year interval.

A comparison with Widdowson's cross-sectional values for animal protein shows that our values are always appreciably higher than those for the British children.

In order to view our data longitudinally in terms of individual patterns of consumption of animal protein, the boys and girls in the Maturity Series were classified according to their levels of intake into pattern groups by a procedure described in the text, using values for cumulative intakes of animal protein within specified age intervals. The frequency of occurrence of the individual longitudinal patterns of animal protein intake are presented in the tables, and the figures show the gradation of difference in levels of animal protein intake as well as in the direction and rate of change within patterns and between pattern groups.




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