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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Secular trend in age at menarche in indigenous and nonindigenous women in Chile
American Journal of Human Biology, Volume 22, No. 5, Year 2010
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Description
Objectives: To estimate the secular trend in age at menarche, comparing indigenous and nonindigenous women, and its relationship with socio-demographic, family and nutritional factors. Methods: A study (historical cohorts) of 688 indigenous and nonindigenous women, divided into four birth cohorts (1960-69, 1970-79, 1980-89, and 1990-96) in an area in central southern Chile was carried out. Data and measurements were collected by health professionals using a previously validated questionnaire. Age at menarche was selfreported (recall). Adjusted differences among cohorts were estimated using a multivariate regression model. Results: A secular trend (P < 0.001) in age at menarche was found in both ethnic groups, with no significant differences between them (P > 0.05). In an adjusted model, a reduction in age at menarche was estimated at 3.7 months per decade between 1960 and 1990. This trend was moderated by higher socio-economic level, smaller number of siblings, and cohabitation with a single parent during infancy. Conclusions: The trend has occurred in a steady progression over time in indigenous women, whereas in nonindigenous women, it was slow initially but has accelerated in recent years. Nonindigenous women have maintained a slightly lower age of menarche than their indigenous counterparts. © 2010 Wiley-Liss, Inc.
Authors & Co-Authors
Muñoz, Sergio R.
Chile, Temuco
Universidad de la Frontera
Amigo, Hugo
Chile, Santiago
Universidad de Chile
Bangdiwala, Shrikant I.
United States, Chapel Hill
The University of North Carolina at Chapel Hill
Statistics
Citations: 11
Authors: 3
Affiliations: 3
Identifiers
Doi:
10.1002/ajhb.21068
ISSN:
15206300
Study Design
Cohort Study
Participants Gender
Female