Degree of resemblance of the pattern of growth among sibs in families of West Bengal (India)

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Abstract
The Preece-Baines Model 1 curve was fitted to longitudinal data on growth in height of 105 boys and girls in 70 Bengal families: 60 of these were sibs distributed in 25 families. For a number of growth characteristics, such as age at peak height velocity [PHV], the proportion of the total population variance that was due to variation between, as opposed to within, families was estimated by Smith''s (1980) method. The proportions for age at take-off of the adolescent spurt, of age at PHV, and of PHV itself were 22%, 26% and 33% (where adult height gives a value of about 40%). The sample is small and these estimates have high standard errors and need confirmation.