Document Type



Longitudinal measurements of weight/stature or weight/recumbent length2 and calf circumference from the Fels Longitudinal Study of Growth were used to calculate correlations for sibling pairs measured at the same age from one year to adulthood. Results are compared with those from an earlier analysis of stature (Byard et al. 1983). Unlike cross-sectional studies of adult siblings, the present analysis does not report consistently higher correlations for stature than for the two indicators of body build. Instead, the magnitude of the correlations is found to depend on the age and type of pairing (e.g., brother-brother, sister-sister, brother-sister). The pattern of sibling sub-type correlations is suggestive of sex-linkage for weight/stature and calf circumference in growing children, but not for stature.