Evidence map›Paper›PMID 25048387›Full record

SynthesisMaternal & child nutrition2016

Effects of dietary interventions on pregnancy outcomes: a systematic review and meta-analysis.

Ellie Gresham, Alessandra Bisquera, Julie E Byles, Alexis J Hure

Abstract readMeta-AnalysisSystematic Review
PubMed Full text at PMC Publisher
In one paragraph

Synthesis in Maternal & child nutrition, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers, 8 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
39citing papers in PubMed, 8 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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

39 citing papers in PubMed, 8 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Pooled it
  6. Pooled it
  7. Pooled it
  8. Pooled it
  9. Trial
  10. Trial
  11. Trial
  12. Trial
  13. Trial
  14. Review
  15. Observational
  16. Article
  17. Review
  18. Review
  19. Article
  20. Article
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.

Ellie GreshamResearch Centre for Gender, Health and Ageing, School of Medicine and Public Health, Faculty of Health, University of Newcastle, Callaghan, New South Wales, Australia.
Alessandra BisqueraClinical Research Design IT and Statistical Support (CReDITSS) Unit, University of Newcastle, Callaghan, New South Wales, Australia.
Julie E BylesResearch Centre for Gender, Health and Ageing, School of Medicine and Public Health, Faculty of Health, University of Newcastle, Callaghan, New South Wales, Australia.
Alexis J HureResearch Centre for Gender, Health and Ageing, School of Medicine and Public Health, Faculty of Health, University of Newcastle, Callaghan, New South Wales, Australia.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Dietary intake during pregnancy influences maternal health. Poor dietary practices during pregnancy have been linked to maternal complications. The objective was to determine the effect of dietary intervention before or during pregnancy on pregnancy outcomes. A systematic review was conducted without date restrictions. Randomised controlled trials (RCTs) evaluating whole diet or dietary components and pregnancy outcomes were included. Two authors independently identified papers for inclusion and assessed methodological quality. Meta-analysis was conducted separately for each outcome using random effects models. Results were reported by type of dietary intervention: (1) counselling; (2) food and fortified food products; or (3) combination (counseling + food); and collectively for all dietary interventions. Results were further grouped by trimester when the intervention commenced, nutrient of interest, country income and body mass index. Of 2326 screened abstracts, a total of 28 RCTs were included in this review. Dietary counselling during pregnancy was effective in reducing systolic [standardised mean difference (SMD) -0.26, 95% confidence interval (CI) -0.45 to -0.07; P < 0.001] and diastolic blood pressure (SMD -0.57, 95% CI -0.75 to -0.38; P < 0.001). Macronutrient dietary interventions were effective in reducing the incidence of preterm delivery (SMD -0.19, 95% CI -0.34 to -0.04; P = 0.01). No effects were seen for other outcomes. Dietary interventions showed some small, but significant differences in pregnancy outcomes including a reduction in the incidence of preterm birth. Further high-quality RCTs, investigating micronutrient provision from food, and combination dietary intervention, are required to identify maternal diet intakes that optimise pregnancy outcomes.

Indexed as

Diet, HealthyEvidence-Based MedicineMaternal Nutritional Physiological PhenomenaPatient Education as TopicFemaleFood, FortifiedHumansHypertension, Pregnancy-InducedInfant, NewbornMalePregnancyPregnancy ComplicationsPregnancy OutcomePremature BirthRandomized Controlled Trials as TopicRisk Factorsdietmeta-analysispregnancyrandomised controlled trialsystematic review

Identifiers

PMID25048387
PMCPMC6860081

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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 OpenQuestion graph.