Secular trend in age at menarche in women in Portugal born between 1920 and 1992: Results from three population-based studies

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Queiroga, AC (Author) Other; Silva, RS (Author) Other; Santos, AC (Author) Other; Maia, I (Author) Other; Barros H (Author) FMUP

Journal

Title: American Journal of Human Biology

Vol. 32

ISSN: 1042-0533

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 2 Citations

Other information

Authenticus ID: P-00S-M1A

DOI: 10.1002/ajhb.23392

Abstract (EN): Objectives Worldwide data on age at menarche suggest a gradually earlier maturation, which is stabilizing in some societies. The interplay between socioeconomic, behavioral, and environmental factors generates uncertainty about the current status and future trend of age at menarche in most societies. Therefore, we aimed to describe trends in age at menarche during the 20th century in Portugal. Methods A sample of 11 274 women born between 1920 and 1992 in northern Portugal, recruited to participate in three population-based cohorts (EPIPorto, EPITeen, and Generation XXI) was evaluated. Age at menarche across birth year categories was compared using ANOVA and the rate of change over time using linear regression. Results Age at menarche decreased with birth year (-31.1 days per 5 years;beta= -.017,P < .001), women born before 1930 having a significantly higher age at menarche than those who were born after 1990 (mean (SD) = 13.1 (1.83) vs 12.0 (1.25),P < .001). Conclusions The decrease in age at menarche in northern Portugal suggests that a plateau is yet to be reached. Attention to time trends in age at menarche is relevant for health promotion since there is a possible relationship between pubertal timing and the later development of the metabolic syndrome.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5