Edad de menarquia y ascendencia indígena. Un estudio poblacional en Chile.

Autores/as

  • Ximena Ossa Universidad de La Frontera
  • Patricia Bustos Universidad de Chile
  • Sergio Muñoz Universidad de La Frontera
  • Hugo Amigo Universidad de Chile

Palabras clave:

(Rev Med Chile…) (Key-words, Factors, Groups, Menarche, Socioeconomic factors)

Resumen

AGE AT MENARCHE AND INDIGENOUS ANCESTRY. A POPULATION STUDY IN CHILE

Background: The age at menarche may influence decisively health and disease in women. It also indicates the beginning of the reproductive period and, as a consequence, the possibility of biological continuity for the human species. Genetic and environmental determinants define the age of menarche and can explain differences found among different populations.  Aim: To determine the age at menarche among adolescents with different levels of indigenous descent (parental indigenous surnames), considering the effect of socioeconomic and demographic factors.  Material and methods: An observational study of historic cohorts of 8.624 girls from the Araucanía Region (central-southern Chile) was carried out. Data were collected by health professionals using a previously validated questionnaire. Occurrence of menarche was estimated through survival analysis and compared between groups (according to indigenous parental surnames) adjusted for parents’ income and educational level and provenance (rural/urban). Results: Estimated median age of menarche was 151 months (95% CI: 150-151). In female with four indigenous surnames, menarche occurred two months later than girls without indigenous surnames and with two indigenous surnames (p<0,001). In girls whose parents had lowest level of schooling, the difference increased to eight months later (p<0,005). Conclusions: Age at menarche in the group with higher indigenous descent is later even if socio-economic conditions remain stable. Genetic factors might play an important role, however conditions of vulnerability can influence and further delay the onset of reproductive competency. 

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Biografía del autor/a

Ximena Ossa, Universidad de La Frontera

Dpto. Salud Pública, Universidad de La Frontera Carrera 228, Temuco Fono: 45-592185

Patricia Bustos, Universidad de Chile

Dpto. Nutrición, Universidad de Chile. Avda. Independencia 1027, Comuna Independencia, R. Metropolitana. Fono: 02-6786213

Sergio Muñoz, Universidad de La Frontera

Centro Excelencia CIGES, Facultad de Medicina, Universidad de La Frontera Freire 115, Temuco Fono: 45-325740

Hugo Amigo, Universidad de Chile

Dpto. Nutrición, Universidad de Chile. Avda. Independencia 1027, Comuna Independencia, R. Metropolitana. Fono: 02-6786213

Publicado

2012-07-30

Cómo citar

Ossa, X., Bustos, P., Muñoz, S., & Amigo, H. (2012). Edad de menarquia y ascendencia indígena. Un estudio poblacional en Chile. Revista Médica De Chile, 140(8). Recuperado a partir de https://www.revistamedicadechile.cl/index.php/rmedica/article/view/1873

Número

Sección

Artículos de Investigación