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Infant growth and onset of puberty: prospective observations from Hong Kong's "Children of 1997" birth cohort.
Ann Epidemiol. 2012 Jan; 22(1):43-50.AE

Abstract

PURPOSE

Infant growth and early puberty are associated with the risk of cardiovascular disease. It is unclear whether pubertal timing has an independent etiologic role or is a marker of preceding growth. We examined whether infant growth was associated with age at pubertal onset and whether any associations were mediated by childhood height or body mass index.

METHODS

We used multivariable interval-censored proportional hazards regression in 6873 term births (87% follow-up, 53% male) from a population-representative Hong Kong Chinese birth cohort, "Children of 1997." We examined the adjusted associations of sex-specific infant growth trajectories, derived from latent class analyses by the use of, on average, 4.2 measurements per child, with clinically assessed age at pubertal onset (Tanner stage II). We used Sobel tests to assess mediation.

RESULTS

Compared with children of average birth weight whose weight followed the same centile curve, a faster weight growth trajectory from birth to 12 months was associated with earlier pubertal onset (time ratio, 0.979; 95% confidence interval, 0.965-0.993) among boys, whereas girls born light with slow infant growth had later puberty (time ratio 1.020, 95% confidence interval 1.006-1.034). These associations were mediated by both height and body mass index among girls but only by height in boys.

CONCLUSIONS

Infant weight growth may be associated with earlier pubertal onset, particularly in boys, at least in part because it is associated with more linear growth in childhood. Earlier pubertal onset may be an indicator of up-regulation of growth axes related to the risk of cardiovascular disease.

Authors+Show Affiliations

Lifestyle and Lifecourse Epidemiology Group, School of Public Health, The University of Hong Kong.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22056481

Citation

Hui, L L., et al. "Infant Growth and Onset of Puberty: Prospective Observations From Hong Kong's "Children of 1997" Birth Cohort." Annals of Epidemiology, vol. 22, no. 1, 2012, pp. 43-50.
Hui LL, Wong MY, Lam TH, et al. Infant growth and onset of puberty: prospective observations from Hong Kong's "Children of 1997" birth cohort. Ann Epidemiol. 2012;22(1):43-50.
Hui, L. L., Wong, M. Y., Lam, T. H., Leung, G. M., & Schooling, C. M. (2012). Infant growth and onset of puberty: prospective observations from Hong Kong's "Children of 1997" birth cohort. Annals of Epidemiology, 22(1), 43-50. https://doi.org/10.1016/j.annepidem.2011.10.003
Hui LL, et al. Infant Growth and Onset of Puberty: Prospective Observations From Hong Kong's "Children of 1997" Birth Cohort. Ann Epidemiol. 2012;22(1):43-50. PubMed PMID: 22056481.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Infant growth and onset of puberty: prospective observations from Hong Kong's "Children of 1997" birth cohort. AU - Hui,L L, AU - Wong,Man-Yu, AU - Lam,Tai Hing, AU - Leung,Gabriel M, AU - Schooling,C Mary, Y1 - 2011/11/04/ PY - 2011/04/04/received PY - 2011/08/20/revised PY - 2011/10/03/accepted PY - 2011/11/8/entrez PY - 2011/11/8/pubmed PY - 2012/4/4/medline SP - 43 EP - 50 JF - Annals of epidemiology JO - Ann Epidemiol VL - 22 IS - 1 N2 - PURPOSE: Infant growth and early puberty are associated with the risk of cardiovascular disease. It is unclear whether pubertal timing has an independent etiologic role or is a marker of preceding growth. We examined whether infant growth was associated with age at pubertal onset and whether any associations were mediated by childhood height or body mass index. METHODS: We used multivariable interval-censored proportional hazards regression in 6873 term births (87% follow-up, 53% male) from a population-representative Hong Kong Chinese birth cohort, "Children of 1997." We examined the adjusted associations of sex-specific infant growth trajectories, derived from latent class analyses by the use of, on average, 4.2 measurements per child, with clinically assessed age at pubertal onset (Tanner stage II). We used Sobel tests to assess mediation. RESULTS: Compared with children of average birth weight whose weight followed the same centile curve, a faster weight growth trajectory from birth to 12 months was associated with earlier pubertal onset (time ratio, 0.979; 95% confidence interval, 0.965-0.993) among boys, whereas girls born light with slow infant growth had later puberty (time ratio 1.020, 95% confidence interval 1.006-1.034). These associations were mediated by both height and body mass index among girls but only by height in boys. CONCLUSIONS: Infant weight growth may be associated with earlier pubertal onset, particularly in boys, at least in part because it is associated with more linear growth in childhood. Earlier pubertal onset may be an indicator of up-regulation of growth axes related to the risk of cardiovascular disease. SN - 1873-2585 UR - https://www.unboundmedicine.com/medline/citation/22056481/Infant_growth_and_onset_of_puberty:_prospective_observations_from_Hong_Kong's_"Children_of_1997"_birth_cohort_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1047-2797(11)00285-7 DB - PRIME DP - Unbound Medicine ER -