Report on the Agricultural Experiment Stations, 1952 Page: 96
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96 REPORT ON EXPERIMENT STATIONS, 1952
The following discussion, with selected examples, will give a few
of the pertinent facts being found in these regional studies, and will
point up some of the implications for the growing science of nutrition.
Dietary records obtained in the surveys were calculated into terms
of nutrient intakes. These were compared with the recommended
daily allowances of the National Research Council, to give presumptive
evidence of the nutritional adequacy of the diets. The Kansas
investigators, for example, estimated that half of the diets of the
children studied were inadequate in ascorbic acid and calcium; Iowa
workers also noted that ascorbic acid and calcium were the most frequent
deficiencies. In the Louisiana study, the children were found
to have a fairly good mean nutrient intake; more than 60 percent met
the National Research Council's recommendations for dietary allowances
for all nutrients except ascorbic acid, for which only 21 percent
met the recommended allowance. In the Oregon group over 60 percent
of the children had diets adequate in all nutrients except iron
and ascorbic acid; for these two nutrients, respectively, only 41 and
43 percent of the children had adequate intakes. New York (Cornell)
investigators observed that ascorbic acid, and also calcium, fell below
the recommended daily allowances more often than did calories or
any of the other seven nutrients studied.
There was some evidence that younger children had better diets
than the older children. In the Louisiana group, for example, a much
larger percentage of the 8- and 9-year-olds than of the 10- and 11-yearolds
met or exceeded the recommended allowances. Results of the
dietary studies by the New York (Cornell) station indicated that
about 55 percent of the children 13 years of age or more had nutrient
intakes below those recommended by the National Research Council,
whereas 40 percent of the 10- to 12-year-olds, 30 percent of the 7- to
9-year-olds, and only 20 percent of the 4- to 6-year-olds had nutrient
intakes lower than these recommended allowances.
Past research has built up considerable evidence to indicate
that hemoglobin values and blood levels of certain nutrients are
influenced by nutrient intake, among other factors. Blood values associated
with good, fair, and poor nutriture have not, however, been
definitely established, although a classification proposed by Bessey
and Lowry, on the basis of a study of 1,200 children, is frequently
used for reference in appraising the nutriture of subjects in that age
group. When rated by the Bessey-Lowry classification, the majority
of the children studied by the Oregon station had high values for all
the six blood constituents determined, with the exception of serum
carotene, in which about 50 percent of the children were classified as
"fair." A considerable number of subjects studied, however, rated
low for several of the blood tests. More than 45 percent of the entire
group of Louisiana children studied met the "good" levels for hemoglobin
and serum vitamin A, carotene, and ascorbic acid. The data
from these studies showed differences with respect to sex and age in
the levels of certain of the blood constituents, as well as interregional
and initraregional differences.
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United States. Office of Experiment Stations. Report on the Agricultural Experiment Stations, 1952, book, January 1953; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc5990/m1/98/: accessed September 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.