Trends of Menarcheal Age in Women in the Reproductive Age and Menopause in Shanghai

Abstract

Aim: To explore the factors affecting menarcheal age by investigating two groups of women differing in age by 10-15 years in Shanghai. Methods: Data on 5,207 women were collected from January 2011 to May 2012: 2,151 women of reproductive age from the Obstetrical Department and 3,056 women in menopause from the Medical Center of the Sixth Hospital of Shanghai City. General data and data on menarcheal age and medical history were collected. The two groups were divided into subgroups from <10 to ≥20 years, i.e. 12 subgroups in total, respectively. SPSS 17.0 software was used to examine statistical differences. Results: The onset of menarcheal age of reproductive age women was 0.5 years earlier than that of menopause women (p < 0.05). In the early menarche age group (<13 years old), there were more reproductive age and high-educated women. Correlation analysis found the current body mass index in menopausal women was significantly negatively correlated with their menarcheal age (r = -0.033, p < 0.05). Conclusions: There was a downward trend in menarcheal age in women of Shanghai and its surrounding areas. Economic environment and education background were the main factors affecting menarcheal age, and menarcheal age may be considered as a predictor of adult obesity.

Breast Cancer Challenges and Screening in China: Lessons From Current Registry Data and Population Screening Studies

“…As expected, the prevalence of central obesity among Chinese adults has increased from 1993 to 2009 [32]. The average age of menarche onset in Chinese women also declined [33,34]. The earlier onset of menarche among Chinese girls was reported to be related to economic development and an increase in body mass index [33].…”

“…The average age of menarche onset in Chinese women also declined [33,34]. The earlier onset of menarche among Chinese girls was reported to be related to economic development and an increase in body mass index [33]. With the improvement in the economy, the consumption of soy, vegetables, and grains has gradually declined, with a concomitant increase in the consumption of meat and oil among the Chinese people [35].These lifestyle shifts could possibly have introduced additional risks to Chinese women, resulting in the increasing burden of BC.…”