Evidence map›Paper›PMID 29040334›Full record

SynthesisPloS one2017

Advanced maternal age and adverse pregnancy outcomes: A systematic review and meta-analysis.

Samantha C Lean, Hayley Derricott, Rebecca L Jones, Alexander E P Heazell

2 registry-linked trialsAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 358 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
358citing papers in PubMed, 5 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT05647798 naterminatednot on this mapstarted 2023, after this paper: background citation

Management of Intrapartum Glycemia in Gestational Diabetic Mothers: A Randomized Controlled Trial

TypeinterventionalSponsorInova Health Care ServicesRan2023 to 2024Enrolled2ConditionsPregnancy, Gestational Diabetes Mellitus, Class A2, Neonatal HypoglycemiaArmsBlood sugar check every 2 hours, Blood sugar check every 4 hours
NCT05720169 unknown statusnot on this mapstarted 2023, after this paper: background citation

Fetal, Obstetrics and Reproduction Genomics

TypeobservationalSponsorFundación GinemedRan2023 to 2024Enrolled400ConditionsPreeclampsia, Intrauterine Growth Restriction, Placental DiseaseArmsDoppler ultrasound, Blood sample
3 · Its place in the literature

Who cites it

358 citing papers in PubMed, 5 syntheses or guidelines pooled it.

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  14. Pregnancy Outcome in Women Aged 40 Years and Above: A Cross Sectional Study.Journal of obstetrics and gynaecology of India · 2026
    Article
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298 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Samantha C LeanMaternal and Fetal Health Research Centre, Division of Developmental Biology and Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom.ORCID http://orcid.org/0000-0001-6434-0782
Hayley DerricottMaternal and Fetal Health Research Centre, Division of Developmental Biology and Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom.
Rebecca L JonesMaternal and Fetal Health Research Centre, Division of Developmental Biology and Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom.
Alexander E P HeazellMaternal and Fetal Health Research Centre, Division of Developmental Biology and Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAdvanced maternal age (AMA; ≥35 years) is an increasing trend and is reported to be associated with various pregnancy complications.

objectiveTo determine the risk of stillbirth and other adverse pregnancy outcomes in women of AMA. SEARCH STRATEGY: Embase, Medline (Ovid), Cochrane Database of Systematic Reviews, ClinicalTrials.gov, LILACS and conference proceedings were searched from ≥2000. SELECTION CRITERIA: Cohort and case-control studies reporting data on one or more co-primary outcomes (stillbirth or fetal growth restriction (FGR)) and/or secondary outcomes in mothers ≥35 years and <35 years. DATA COLLECTION AND ANALYSIS: The effect of age on pregnancy outcome was investigated by random effects meta-analysis and meta-regression. Stillbirth rates were correlated to rates of maternal diabetes, obesity, hypertension and use of assisted reproductive therapies (ART). MAIN

resultsOut of 1940 identified titles; 63 cohort studies and 12 case-control studies were included in the meta-analysis. AMA increased the risk of stillbirth (OR 1.75, 95%CI 1.62 to 1.89) with a population attributable risk of 4.7%. Similar trends were seen for risks of FGR, neonatal death, NICU unit admission restriction and GDM. The relationship between AMA and stillbirth was not related to maternal morbidity or ART.

conclusionsStillbirth risk increases with increasing maternal age. This is not wholly explained by maternal co-morbidities and use of ART. We propose that placental dysfunction may mediate adverse pregnancy outcome in AMA. Further prospective studies are needed to directly test this hypothesis.

Indexed as

Maternal AgeAdultDiabetes, GestationalFemaleHumansInfant, NewbornMiddle AgedPregnancyPregnancy ComplicationsPregnancy OutcomeStillbirth

Identifiers

PMID29040334
PMCPMC5645107

What Socratic holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.