National Archive of Computerized Data on Aging

Biodemographic Models of Reproductive Aging (BIMORA) Project, 1998-2002 [United States] (ICPSR 4452) RSS

Principal Investigator(s):

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.

Access Notes

  • One or more files in this study are not available for download due to special restrictions; consult the restrictions note to learn more. Additional information can also be found in the Use Agreement.

    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, the BIMORA data is restricted from general dissemination. To obtain this file, researchers must agree to the terms and conditions of a Restricted Data Use Agreement in accordance with existing DSDR and ICPSR servicing policies. Researchers can download the BIMORA Restricted Data Use Agreement from either the browse documentation page or the download page associated with this dataset.

  • Data Sharing for Demographic ResearchThis study is maintained and distributed by Data Sharing and Demographic Research, a project funded by the Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD).

Dataset(s)

DS0:  Study-Level Files
DS1:  Dataset
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Study Description

Citation

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. doi:10.3886/ICPSR04452.v2

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Funding

This study was funded by:

  • United States Department of Health and Human Services. National Institutes of Health. Eunice Kennedy Shriver National Institute of Child Health and Human Development (1R01HD034159)
  • United States Department of Health and Human Services. National Institutes of Health. National Institute on Aging (1R01AG015141)

Scope of Study

Subject Terms:   birth control, fertility, health, life expectancy, menopause, pregnancy, reproductive history, sexual reproduction, women

Geographic Coverage:   United States

Time Period:  

  • 1998--2002

Unit of Observation:   individual

Universe:   Women of reproductive age from onset of menstruation to menopause.

Data Types:   clinical data

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, dsdr@icpsr.umich.edu, if further information is desired.

The data are also made available in a format developed by the investigators to create an SQL database.

Methodology

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.

Mode of Data Collection:   mixed mode

Data Source:

BIMORA laboratory data

TREMIN calendar card data

TREMIN health questionnaires

Version(s)

Original ICPSR Release:  

Version History:

  • 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.

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