May 1965


Author Affiliations

Professor of Biostatistics University of California School of Public Health Earl Warren Hall Berkeley, Calif 94704

Am J Dis Child. 1965;109(5):467. doi:10.1001/archpedi.1965.02090020469019

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To the Editor: In our paper "Birth Weight and Gestation as Indices of 'Immaturity'" (Amer J Dis Child 109:43 [Jan] 1965), we divided the births in five groups according to birth weight and length of gestation. The birth weights were available to us in pounds and ounces. The editorial staff of the Journal following the policy of the American Medical Association converted the pounds and ounces into grams. This procedure created odd groupings and left certain births without a "resting place." For example, the group of 3 lb 8 oz was converted to 1,588 gms; the lower limit of the next group—3 lb 9 oz—became 1,617 gm. Thus, the odd figures of 1,588 and 1,617 leave the impression that the weights have been adjusted to single grams, and, what is worse, they leave infants weighing between 1,588 and 1,617 gm unclassified.

I am sure that most of your readers, after

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