La pubertad en niños chilenos muestra un adelantamiento en el inicio del crecimiento testicular / Age of onset of puberty in Chilean boys according to testicular volume and Tanner stage
Rev. méd. Chile
;
143(3): 297-303, mar. 2015. graf, tab
Article
in Spanish
| LILACS
| ID: lil-745626
ABSTRACT
Background:
A secular trend towards a younger age of puberty onset has been reported in Chilean girls.Aim:
To evaluate the age of onset of puberty and prevalence of early puberty in Chilean boys. Material andMethods:
A pediatric endocrinologist examined 319 children attending schools in central Santiago. Pubertal development was assessed by testicular volume (TV) and genital inspection (GI) using Tanner graduation. Precocious and early puberty development was diagnosed if TV ≥ 4 ml or GI > stage 2 occurred in boys younger than 9 years and at 9-10 years of age, respectively.Results:
Pubertal onset occurred at 10.2 ± 1.5 years according to TV and at 11.1 ± 1.6 years according to GI (p < 0.01). Before the age of nine, 15.2% of children had a VT ≥ 4 ml, 3% had genital changes in GI and only 3% had both changes simultaneously. Early puberty was observed in 23.8% of children according to TV and 9.5% according to GI. However, no child of less than 11 years old had a TV ≥ 4 ml, genital changes and pubic hair simultaneously. Late pubertal stages occurred at the same age according to both criteria used. Body mass index z score was not associated with the age of pubertal onset.Conclusions:
Testicular enlargement occurs one year earlier than changes in genitalia according to inspection. Testicular growth, but not late stages of puberty, are occurring one year earlier than previously reported in Chile 10 years ago.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Cell Differentiation
/
Antigen Presentation
/
Cross-Priming
/
Gram-Negative Bacteria
/
Gram-Positive Bacteria
Type of study:
Controlled clinical trial
/
Risk factors
Limits:
Adult
/
Aged
/
Female
/
Humans
/
Male
Country/Region as subject:
South America
/
Chile
Language:
Spanish
Journal:
Rev. méd. Chile
Journal subject:
Medicine
Year:
2015
Type:
Article
Affiliation country:
Chile
Institution/Affiliation country:
Universidad de Chile/CL
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