A Follow-up Study of Women Evaluated and Treated for Infertility
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|ClinicalTrials.gov Identifier: NCT00342446|
Recruitment Status : Completed
First Posted : June 21, 2006
Last Update Posted : November 8, 2017
|Condition or disease|
|Ovarian Cancer Breast Cancer Endometrial Cancer Thyroid Cancer Colrectal Cancer, Melanoma|
BACKGROUND: We previously conducted a retrospective cohort study of 12,193 patients evaluated for infertility between 1960-1988 at five clinical sites. Detailed information abstracted from the medical records, along with questionnaires administered to located patients and cancer incidence and mortality data derived from cancer registries and the National Death Index, allowed us to examine cancer risk related to different causes of infertility and treatments while controlling for other patient characteristics. Although there were some increases of certain cancers related to various causes of infertility, we generally did not observe substantial relationships related to use of different fertility drugs. The one exception was some increased risk of uterine cancers with clomiphene use, of interest given the drug's chemical similarity to tamoxifen. Our numbers of patients with certain cancers (e.g., ovarian, uterine) were, however, limited and we had insufficient power to evaluate subgroup effects (e.g., drug relationships among nulligravid women).
OBJECTIVES: We therefore conducted an updated follow-up of these patients in order to assess cancer risk in relation to causes of infertility and therapeutic regimens used to treat these causes.
ELIGIBILITY: This study gained an additional 10 years of follow-up among the patients deemed eligible for the previous investigation. This included women with both primary and second infertility. Approximately 39% of the cohort previously were prescribed clomiphene citrate, while 10% received gonadotrophins.
DESIGN: Passive follow-up was attempted for patients who previously did not participate and for whom only information available in clinic records could be retained. All other patients were traced for active as well as passive follow-up. Active follow-up involved requesting that patients complete a short questionnaire, whereas passive follow-up was via linkage to cancer registries and the National Death Index. While cancer risks were assessed in relation to the general population, the majority of comparisons were internal ones, involving the calculation of relative risks (RRs) associated with different causes of infertility or treatment regimens while controlling for other cancer risk predictors.
|Study Type :||Observational|
|Estimated Enrollment :||12193 participants|
|Official Title:||Follow-Up Study of Women Evaluated and Treated for Infertility|
|Study Start Date :||June 5, 1996|
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00342446
|United States, New York|
|New York, New York, United States, 10032-3784|
|Principal Investigator:||Britton L Trabert, Ph.D.||National Cancer Institute (NCI)|