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Analysis of institutional authors

De La Calle MAuthorBartha JlAuthorCuerva MjAuthorRamiro-Cortijo DAuthor

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December 20, 2021
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Women aged over 40 with twin pregnancies have a higher risk of adverse obstetrical outcomes

Publicated to:International Journal of Environmental Research and Public Health. 18 (24): 13117- - 2021-12-01 18(24), DOI: 10.3390/ijerph182413117

Authors: de la Calle, Maria; Bartha, Jose L; Garcia, Laura; Cuerva, Marcos J; Ramiro-Cortijo, David

Affiliations

Hosp Univ Gregorio Maranon, Dept Pediat, Madrid 28007, Spain - Author
Hosp Univ La Paz, Dept Obstet & Gynecol, Madrid 28046, Spain - Author
Hospital General Universitario Gregorio Marañón - Author
Hospital Universitario La Paz - Author
Univ Autonoma Madrid, Fac Med, Dept Physiol, Madrid 28029, Spain - Author
Universidad Autónoma de Madrid - Author
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Abstract

Maternal age is related to a higher risk of adverse maternal, fetal, and neonatal outcomes in twin pregnancies. However, whether this increase in adverse outcomes is due solely to age or due to risk factors that are more common in women over 40 remains unknown. The aim of this study is to assess if maternal age over 40 years old is an independent risk factor for obstetric adverse outcomes in dichorionic diamniotic twin gestations. In this single-center retrospective cohort study, we compared the obstetric outcomes of women with dichorionic diamniotic twin pregnancies below and over 40 years of age. A twin pregnancy cohort enrolled between 2013 and 2019 was included in the study. Maternal, fetal, and labor complications were recorded. A total of 510 women were analyzed in two groups: 266 women below 40 years old and 244 women over 40 years old. Maternal age over 40 increased the odds of maternal (aOR = 1.9 (1.3; 2.9); p-value = 0.002), fetal (aOR = 1.8 (1.0; 3.0); p-value = 0.037), and labor complications (aOR = 2.5 (1.3; 4.6); p-value = 0.004). Maternal age over 40 years was the most important factor increasing the odds of having a caesarean section (C-section). Over 40 years old was an independent risk factor for complications in dichorionic diamniotic twin pregnancies.

Keywords

agingc-sectioncomplicationsimpactpregnancy complicationspreterm laborAdvanced maternal ageAgingC-sectionPregnancy complicationsPreterm laborTwin pregnancy

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal International Journal of Environmental Research and Public Health due to its progression and the good impact it has achieved in recent years, according to the agency Scopus (SJR), it has become a reference in its field. In the year of publication of the work, 2021, it was in position , thus managing to position itself as a Q1 (Primer Cuartil), in the category Public Health, Environmental and Occupational Health.

From a relative perspective, and based on the normalized impact indicator calculated from the Field Citation Ratio (FCR) of the Dimensions source, it yields a value of: 3.14, which indicates that, compared to works in the same discipline and in the same year of publication, it ranks as a work cited above average. (source consulted: Dimensions Aug 2025)

Specifically, and according to different indexing agencies, this work has accumulated citations as of 2025-08-06, the following number of citations:

  • WoS: 3
  • Scopus: 4

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-08-06:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 22 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

    It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

    • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
    • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: https://repositorio.uam.es/handle/10486/716960

    Leadership analysis of institutional authors

    There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (DE LA CALLE FERNANDEZ-MIRANDA, MARIA) and Last Author (RAMIRO CORTIJO, DAVID).