TY - JOUR
T1 - Cancer incidence in a cohort of infertile women
AU - Ron, Elaine
AU - Lunenfeld, Bruno
AU - Menczer, Joseph
AU - Blumstein, Tzvia
AU - Katz, Leah
AU - Oelsner, Gabriel
AU - Serr, David
N1 - Funding Information:
6Israel Cancer Registry, Jerusalem, Israel. This research was supported in part by a grant from the Chief Scientist's Office of the Israel Ministry of Health. The authors are grateful to Raya Mananyim for abstracting the data, to Rivka Sharon, Hannah Mart, and Lorice Yankelevitz for technical assistance, and to Lynette Goodman for help with the manuscript.
PY - 1987/5
Y1 - 1987/5
N2 - To explore further the relation between infertility and breast and female reproductive cancers, cancer incidence among 2,632 Israeli women treated for infertility between 1964 and 1974 was evaluated. Cancer Incidence through December 1981 was determined by matching the study cohort to the Israel Cancer Registry. The observed number of cancers was compared with sex-age-ethnic and calendar-year, site-specific national cancer rates. There were 42 cancers observed compared with 37.4 expected, yielding a standardized incidence ratio of 1.1 (95% confidence interval (Cl) = 0.8-1.5). Analysis by infertility diagnosis demonstrated no significant excess of total cancer incidence; the standardized incidence ratio was 1.3 (95% Cl = 0.8-1.8) for infertility due to hormonal deficiency, 0.7 (95% Cl = 0.3-1.4) for mechanical infertility, 1.6 (95% Cl = 0.6-3.6) for infertility of the male partner, and 1.1 (95% Cl = 0.5-2.2) for unclassified diagnosis. Site-specific analyses revealed a significantly increased risk (8.0; 95% Cl = 2.5-19.3; four cases observed, 0.50 expected) of endometrial cancer for the hormonal group and a nonsignificant excess of breast cancer and melanoma. Although numbers were small, women with disorders causing unopposed estrogen production had a risk of 1.4 (95% Cl = 0.8-2.2) for all cancer sites, which reached 10.3 (95% Cl = 2.6-28.2; three cases observed, 0.29 expected) for endometrial cancer and 1.8 (95% Cl = 0.8-3.4; eight cases observed, 4.43 expected) for breast cancer. Among women with nonhormonal infertility, there was a suggestion of increased risks of carcinoma of the ovary (3.2; 95% Cl = 0.3-32.9; two cases observed, 0.63 expected) and thyroid (3.0; 95% Cl = 0.3-24.6; two cases observed; 0.67 expected). No evidence of an association between ovulation-inducing drugs and cancer was found. This study supports the hypothesis that infertility caused by hormone deficiency is a risk factor for uterine cancer, but is inconclusive regarding breast cancer.
AB - To explore further the relation between infertility and breast and female reproductive cancers, cancer incidence among 2,632 Israeli women treated for infertility between 1964 and 1974 was evaluated. Cancer Incidence through December 1981 was determined by matching the study cohort to the Israel Cancer Registry. The observed number of cancers was compared with sex-age-ethnic and calendar-year, site-specific national cancer rates. There were 42 cancers observed compared with 37.4 expected, yielding a standardized incidence ratio of 1.1 (95% confidence interval (Cl) = 0.8-1.5). Analysis by infertility diagnosis demonstrated no significant excess of total cancer incidence; the standardized incidence ratio was 1.3 (95% Cl = 0.8-1.8) for infertility due to hormonal deficiency, 0.7 (95% Cl = 0.3-1.4) for mechanical infertility, 1.6 (95% Cl = 0.6-3.6) for infertility of the male partner, and 1.1 (95% Cl = 0.5-2.2) for unclassified diagnosis. Site-specific analyses revealed a significantly increased risk (8.0; 95% Cl = 2.5-19.3; four cases observed, 0.50 expected) of endometrial cancer for the hormonal group and a nonsignificant excess of breast cancer and melanoma. Although numbers were small, women with disorders causing unopposed estrogen production had a risk of 1.4 (95% Cl = 0.8-2.2) for all cancer sites, which reached 10.3 (95% Cl = 2.6-28.2; three cases observed, 0.29 expected) for endometrial cancer and 1.8 (95% Cl = 0.8-3.4; eight cases observed, 4.43 expected) for breast cancer. Among women with nonhormonal infertility, there was a suggestion of increased risks of carcinoma of the ovary (3.2; 95% Cl = 0.3-32.9; two cases observed, 0.63 expected) and thyroid (3.0; 95% Cl = 0.3-24.6; two cases observed; 0.67 expected). No evidence of an association between ovulation-inducing drugs and cancer was found. This study supports the hypothesis that infertility caused by hormone deficiency is a risk factor for uterine cancer, but is inconclusive regarding breast cancer.
KW - Follow-up studies
KW - Infertility
KW - Neoplasms
UR - http://www.scopus.com/inward/record.url?scp=0023181647&partnerID=8YFLogxK
U2 - 10.1093/oxfordjournals.aje.a114595
DO - 10.1093/oxfordjournals.aje.a114595
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:0023181647
VL - 125
SP - 780
EP - 790
JO - American Journal of Epidemiology
JF - American Journal of Epidemiology
SN - 0002-9262
IS - 5
ER -