PEDIATRICS Vol. 78 No. 4 October 1986, pp. 646-650
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Growth and Intellectual Development

Darrell M. Wilson MD1, Lawrence D. Hammer MD1, Paula M. Duncan MD1, Sanford M. Dornbusch PhD1, Philip L. Ritter PhD1, Raymond L. Hintz MD1, Ruth T. Gross MD1, and Ron G. Rosenfeld MD1

1 From the Departments of Pediatrics and Sociology, Stanford University, Stanford, California

Data from the National Health Examination Survey (cycles II and III) provided a representative sample of 13,887 US youths (6 to 17 years of age) with which to examine the relationship between height (normalized for age and sex) and measures of intellectual development (Wechsler Intelligence Scale for Children) and academic achievement (Wide Range Achievement Test). Additionally, 2,177 subjects were studied first in cycle II and 2 to 5 years later in cycle III, forming a well-selected longitudinal study group in which to examine any association between linear growth and change in IQ scores. Wechsler Intelligence Scale for Children and Wide Range Achievement Test scores were significantly correlated with height in both cycle II and cycle III. However, no significant association between change in relative height and change in IQ scores could be detected in the longitudinal group. These data suggest that therapies designed to increase height are unlikely to alter measures of intellectual development or academic achievement.

Key Words: IQ • growth • height

Submitted on July 10, 1985
Accepted on March 14, 1986




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