September 1985, Vol 139, No. 9 >

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Article | September 1985

Growth Quotients, Z Scores, and Failure to Thrive

PHILIP A. WALRAVENS, MD

Am J Dis Child. 1985;139(9):862. doi:10.1001/archpedi.1985.02140110016015.

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Sir.—The article by Ellerstein and Ostrov¹ in the February 1985 issue of AJDC provides useful information on the duration of diagnostic hospitalization for children with failure to thrive because of caloric deprivation. The authors also proposed a system for evaluating weight gain in infants with failure to thrive. To this effect, they derived a "growth quotient," which is the mean weight gain of the observed infant divided by the mean weight gain at the fifth percentile of a reference population matched for age and sex. This mathematical calculation shows improvements in weight velocity, particularly in the older infants and children, which a cursory inspection of daily weight gains might not have shown as clearly.

The choice of weight gains at the fifth percentile as the standard of comparison will usually result in growth quotient values higher than what might be observed if the infant's expected growth pattern is

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Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

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WALRAVENS PA. Growth Quotients, Z Scores, and Failure to Thrive. Am J Dis Child. 1985;139(9):862. doi:10.1001/archpedi.1985.02140110016015.

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