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Reproductive factors and the risk of invasive and intraepithelial cervical neoplasia.

The relation between reproductive factors and cervical neoplasia was evaluated in a case-control study of 528 cases of invasive cancer compared with 456 control subjects in hospital for acute conditions unrelated to any of the established or suspected risk factors for cervical cancer, and of 335 cas...

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Autores principales: Parazzini, F., La Vecchia, C., Negri, E., Cecchetti, G., Fedele, L.
Formato: Texto
Lenguaje:English
Publicado: Nature Publishing Group 1989
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2247205/
https://www.ncbi.nlm.nih.gov/pubmed/2736217
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author Parazzini, F.
La Vecchia, C.
Negri, E.
Cecchetti, G.
Fedele, L.
author_facet Parazzini, F.
La Vecchia, C.
Negri, E.
Cecchetti, G.
Fedele, L.
author_sort Parazzini, F.
collection PubMed
description The relation between reproductive factors and cervical neoplasia was evaluated in a case-control study of 528 cases of invasive cancer compared with 456 control subjects in hospital for acute conditions unrelated to any of the established or suspected risk factors for cervical cancer, and of 335 cases of cervical intraepithelial neoplasia compared with 262 outpatient controls. The risk of invasive cervical cancer increased with number of livebirths, the estimated multivariate relative risk (RR) being 4.39 in women with five or more births compared with nulliparous women. There was also an inverse relation with age at first livebirth (RR = 0.42 for greater than or equal to 30 vs. less than 20 years) which, however, disappeared after inclusion of parity in multiple logistic regression analysis. Likewise, cases of invasive cervical cancer tended more frequently to report induced abortions. However, this association was not statistically significant after allowance for confounding factors, including parity. No relation emerged with number of spontaneous abortion and age at last pregnancy. When the interaction between parity and sexual habits was analysed, the relative risk increased in subsequent strata of parity with increasing number of sexual partners or decreasing age at first intercourse, thus suggesting an independent effect of sexual and reproductive factors, and hence multiplicative on the relative risk of invasive cervical cancer. No consistent association emerged between the risk of intraepithelial cervical neoplasm and parity, number of abortions and age at first or last birth.
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spelling pubmed-22472052009-09-10 Reproductive factors and the risk of invasive and intraepithelial cervical neoplasia. Parazzini, F. La Vecchia, C. Negri, E. Cecchetti, G. Fedele, L. Br J Cancer Research Article The relation between reproductive factors and cervical neoplasia was evaluated in a case-control study of 528 cases of invasive cancer compared with 456 control subjects in hospital for acute conditions unrelated to any of the established or suspected risk factors for cervical cancer, and of 335 cases of cervical intraepithelial neoplasia compared with 262 outpatient controls. The risk of invasive cervical cancer increased with number of livebirths, the estimated multivariate relative risk (RR) being 4.39 in women with five or more births compared with nulliparous women. There was also an inverse relation with age at first livebirth (RR = 0.42 for greater than or equal to 30 vs. less than 20 years) which, however, disappeared after inclusion of parity in multiple logistic regression analysis. Likewise, cases of invasive cervical cancer tended more frequently to report induced abortions. However, this association was not statistically significant after allowance for confounding factors, including parity. No relation emerged with number of spontaneous abortion and age at last pregnancy. When the interaction between parity and sexual habits was analysed, the relative risk increased in subsequent strata of parity with increasing number of sexual partners or decreasing age at first intercourse, thus suggesting an independent effect of sexual and reproductive factors, and hence multiplicative on the relative risk of invasive cervical cancer. No consistent association emerged between the risk of intraepithelial cervical neoplasm and parity, number of abortions and age at first or last birth. Nature Publishing Group 1989-05 /pmc/articles/PMC2247205/ /pubmed/2736217 Text en https://creativecommons.org/licenses/by/4.0/This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/.
spellingShingle Research Article
Parazzini, F.
La Vecchia, C.
Negri, E.
Cecchetti, G.
Fedele, L.
Reproductive factors and the risk of invasive and intraepithelial cervical neoplasia.
title Reproductive factors and the risk of invasive and intraepithelial cervical neoplasia.
title_full Reproductive factors and the risk of invasive and intraepithelial cervical neoplasia.
title_fullStr Reproductive factors and the risk of invasive and intraepithelial cervical neoplasia.
title_full_unstemmed Reproductive factors and the risk of invasive and intraepithelial cervical neoplasia.
title_short Reproductive factors and the risk of invasive and intraepithelial cervical neoplasia.
title_sort reproductive factors and the risk of invasive and intraepithelial cervical neoplasia.
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2247205/
https://www.ncbi.nlm.nih.gov/pubmed/2736217
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