Perspectives in Human Growth, Development and Maturation by L. D. Voss (auth.), Parasmani Dasgupta, Roland Hauspie

By L. D. Voss (auth.), Parasmani Dasgupta, Roland Hauspie (eds.)

One morning in 1969, abruptly, I bought a letter which either distressed and astonished me. It was once from a Prof. S. R. Das in Calcutta, who asked me to just accept, for eventual research, a mountain of anthropometric info he had amassed, as he used to be in poor health and didn't count on to outlive to examine it himself. the information supplied the astonishment; twenty-two anthropometric characters recorded each six months or a 12 months, over a interval of 14 years, in a combined longitudinal learn of a few 560 childrens, elderly six months to 20 years. so much have been in households with siblings additionally within the learn, and each baby was once measured at any time when by way of S. R. Das himself. The archive used to be particular, combining the private anthropometry of R. H. Whitehouse within the Harpenden progress examine and the relations technique of the Fels progress examine. This was once a examine of which neither I, nor an individual of my acquaintance, had heard. Even in India, Prof. Das' paintings was once scarcely identified. It grew to become out Das used to be a scholarly guy, quiet and unassuming, totally dedicated to his Sarsuna-Barisha progress Study,just the obverse of the pro showman. truly this was once no longer a request i'll refuse, even supposing I already had in hand sufficient tasks to occupy Siva himself.

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2. SUBJECTS AND METHODS The cross-sectional collection of height data from 1625 subjects (768 boys and 857 girls) was part of a research project on the height growth of school children and adolescents of the province of Biscay (Basque Country, Spain). The exact age in days was computed as the difference between the date of measurement and that of birth. Ages ranged from 7 to 19 years in both sexes. Height data were collected by following the IBP criteria (Weiner and Lourie 1981) during 1997-8. The total size of the collected sample was near to the 1% of the census size of the schooling population of the province.

I··· .. 0 10 12 14 16 18 20 Age (years) Figure 3. Mean-constant growth curves and averages of menarcheal ages (oj by menarcheal height groups. 4 ....... 2 0 e ........ O 10 12 14 16 18 20 Age (years) Figure 4. Mean-constant growth curves and averages of menarcheal ages (oj by menarcheal weight groups. 3 Biological parameters and their relationships Table 3 presents the sample correlation coefficients between menarcheal age, menarcheal and adult body dimension and age at growth completion. The upper and lower triangles of Table 3 are, respectively, the correlation coefficients for the CountGompertz and the Preece-Baines models.

A,B,C,D,E,U) is a growth parameter vector, each component of which is positive. Its growth velocity curve is dH(t) h( t) = --;j( ( ="c l,(t) + ha(t) where hc(t) = l-e-e ha(t) = BeA-Bte -e 160 (5) A-BtJ( D+ t+l E J and A-Bt {U - C - Dt - Eln(t + l)}. 4 -.. 140 -.. 120 E () '-" ..... a. ~ .. 2 : hc(tr~.. 4 ('I , :,..!.. ,'1 '\, ~ ~ : ~r. ---- AgeatPHV ----~----I~ '~~ .. , , : ha(t) ...... ' ------ Age at GC------~--.... ---~-------~... 2 'J .... ----- - . - ". _: -... - - 0 2 4 6 8 iO 12 14 16 18 Q) > -=~ 0 ....

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