Home > Publications . Search All . Browse All . Country . Browse PSC Pubs . PSC Report Series

PSC In The News

RSS Feed icon

Shaefer and Edin's book ($2 a Day) cited in piece on political debate over plight of impoverished Americans

Eisenberg tracks factors affecting both mental health and athletic/academic performance among college athletes

Shapiro says Americans' low spending reflects "cruel lesson" about the dangers of debt

Highlights

Susan Murphy elected to the National Academy of Sciences

Maggie Levenstein named director of ISR's Inter-university Consortium for Political and Social Research

Arline Geronimus receives 2016 Harold R. Johnson Diversity Service Award

PSC spring 2016 newsletter: Kristin Seefeldt, Brady West, newly funded projects, ISR Runs for Bob, and more

Next Brown Bag

PSC Brown Bags
will resume fall 2016

A New Statistical Approach Demonstrated Menstrual Patterns During the Menopausal Transition Did Not Vary by Age at Menopause

Publication Abstract

Lisabeth, L., Sioban D. Harlow, and B. Qaqish. 2004. "A New Statistical Approach Demonstrated Menstrual Patterns During the Menopausal Transition Did Not Vary by Age at Menopause." Journal of Clinical Epidemiology, 57(5): 484-496.

Objective: To describe population mean, variance, and correlation of cycle length across the life span and by age at menopause and age at menarche using a new statistical approach. Study Design and Setting: Data from the Tremin Trust (n = 997), a prospective menstrual diary study, was analyzed. Marginal models with generalized estimating equations were used to describe changes in menstrual parameters across the reproductive life span. Results: During the menopausal transition, the increase in standard deviation preceded that in mean by 2 to 6 years. Although beginning earlier in women with earlier menopause, increases in mean and variance for women with different ages at menopause were parallel. Women with later menopause had longer cycles throughout life and longer, more variable cycles during the transition. Conclusion: The transition from late reproductive life to early menopausal transition appears to begin in the late thirties when variability of cycle length increases. Patterns of change in menstrual function during the menopausal transition do not differ by age at menopause; thus, differences in age at menopause are likely to reflect changes in the timing and not changes in the process of ovarian senescence, at least for the normative ages of menopause. (C) 2004 Elsevier Inc. All rights reserved.

Browse | Search : All Pubs | Next