Biodemographic Models of Reproductive Aging (BIMORA) Project, 1998-2002 [United States] (ICPSR 4452)
Published: Oct 25, 2006 View help for published
Summary View help for Summary
In the early 1990s, researchers at Georgetown University, Pennsylvania State University, and the University of Utah proposed a five-year longitudinal study of female reproductive aging that would include the collection of hormonal, menstrual cycle, and health data from a group of women in order to advance the current understanding of the transition through menopause. The women selected for the BIMORA project were a subset of women belonging to the Tremin Research Program on Women's Health (TREMIN), a longitudinal, prospective study of menstrual cycles and female reproductive health that was begun in the 1930s by Dr. Alan Treloar at the University of Minnesota. As part of the TREMIN study, women recorded their menstrual cycles on calendar cards and were also asked to fill out annual and later biannual health surveys. The first cohort of women was recruited in the 1930s when many of them were attending the University of Minnesota. Some of their daughters, along with additional women, were recruited in the 1960s as part of a second cohort. Recruitment continued after the second cohort, and a total of 156 TREMIN women participated in the five-year BIMORA project. At the beginning of the study, they ranged in age from 25 to 58 years of age and many were from the second TREMIN cohort. Women could not be using exogenous hormones and had to have at least one intact ovary. The participating women had TREMIN data going back as far as the early 1960s, and they continued sending menstrual bleeding and health data to TREMIN during the BIMORA project. In addition, from January 15 to July 14 in each of the five years of the BIMORA project, participants collected daily urine specimens and made a daily record of medication use, health conditions, and menstrual bleeding. These data were analyzed in the BIMORA laboratory. The urine specimens were assayed for urinary conjugates of estrogen, progesterone, LH, and FSH. The TREMIN data and laboratory data were then merged into a single dataset.
Citation View help for Citation
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Subject Terms View help for Subject Terms
Geographic Coverage View help for Geographic Coverage
Restrictions View help for Restrictions
This data collection may not be used for any purpose other than statistical reporting and analysis. Use of these data to learn the identity of any person or establishment is prohibited. To protect respondent privacy, some data files in this collection are restricted from general dissemination. To obtain these restricted files, researchers must agree to the terms and conditions of a Restricted Data Use Agreement.
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Data Collection Notes View help for Data Collection Notes
These data are distributed exactly as they arrived from the data depositor. ICPSR has not checked or processed this material. Users should contact the Data Sharing for Demographic Research (DSDR) archive at ICPSR, firstname.lastname@example.org, if further information is desired.
The data are also made available in a format developed by the investigators to create an SQL database.
Sample View help for Sample
A subset of women participating in the TREMIN research who were not using oral contraception nor hormone replacement therapy who had at least one intact ovary.
Universe View help for Universe
Women of reproductive age from onset of menstruation to menopause.
Unit(s) of Observation View help for Unit(s) of Observation
Data Source View help for Data Source
TREMIN health questionnaires
BIMORA laboratory data
TREMIN calendar card data
Data Type(s) View help for Data Type(s)
Mode of Data Collection View help for Mode of Data Collection
Original Release Date View help for Original Release Date
Version Date View help for Version Date
Version History View help for Version History
- Weinstein, Maxine, and James W. Wood. Biodemographic Models of Reproductive Aging (BIMORA) Project, 1998-2002 [United States]. ICPSR04452-v2. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2006-10-25. http://doi.org/10.3886/ICPSR04452.v2
2006-10-25 A copy of the restricted data was provided for transfer to the secure server. The CASE.COUNT, VARIABLE.COUNT and LRECL fields were updated with ASCII data information.
2006-07-20 The BIMORA Restricted Data Use Agreement is now available for download.
The public-use data files in this collection are available for access by the general public. Access does not require affiliation with an ICPSR member institution.
- The citation of this study may have changed due to the new version control system that has been implemented. Please see version history for more details.
This study was originally processed, archived, and disseminated by Data Sharing for Demographic Research (DSDR), a project funded by the Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD).