Body composition trajectories into adolescence according to age at pubertal growth spurt.
Am J Hum Biol
; 23(2): 216-24, 2011.
Article
en En
| MEDLINE
| ID: mdl-21319251
OBJECTIVE: To investigate whether the development of body composition into adolescence differs among children with an early, average, or late pubertal growth spurt (age at take-off [ATO]). METHODS: Mixed-effect polynomial models were applied to serial anthropometric measurements spanning from 4 years before to 4 years after ATO in 215 DONALD participants. Sex-specific trajectories of fat mass index (FMI, FM/m(2) ), fat-free mass index (FFMI, FFM/m(2) ), and their z-scores were compared among those with an early, average, or late ATO. RESULTS: Compared with girls with a late ATO (reference group), those with an early or average ATO experienced a significant increase in FFMI z-scores [ß (standard error) for linear trends in early and average ATO group: +0.15 (0.05) FFMI z-scores/year (P = 0.001) and +0.11 (0.04) FFMI z-scores/year (P = 0.005), respectively, adjusted for early life factors]. Similar differences were observed in boys [adjusted ß (standard error): +0.20 (0.06) FFMI z-scores/year (P = 0.0004) and +0.07 (0.05) FFMI z-scores/year (P = 0.1), respectively]. Graphical illustration of the predicted trajectories revealed that differences in relative FFMI emerged from ATO onward. For FMI, comparison with late maturers showed a more pronounced quadratic trend (kg/m(2) /years(2) ) (P = 0.01) among early-maturing girls and a reduced linear trend in FMI z-scores/year (P = 0.04) among early-maturing boys. CONCLUSIONS: This longitudinal study suggests that children who experience an early pubertal growth spurt accrue progressively more fat-free mass during the first years of puberty than late-maturing peers of the same age. Higher levels of adiposity commonly observed in adults with early puberty onset are, thus, likely to develop subsequently in later adolescence.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Composición Corporal
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Desarrollo Infantil
/
Pubertad
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Desarrollo del Adolescente
Tipo de estudio:
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Límite:
Adolescent
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Adult
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Child
/
Female
/
Humans
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Male
País/Región como asunto:
Europa
Idioma:
En
Revista:
Am J Hum Biol
Asunto de la revista:
BIOLOGIA
Año:
2011
Tipo del documento:
Article
País de afiliación:
Alemania
Pais de publicación:
Estados Unidos