Evidence map›Paper›PMID 35000200›Full record

ArticleAnnals of the New York Academy of Sciences2022

Calcium supplementation for the prevention of hypertensive disorders of pregnancy: current evidence and programmatic considerations.

Filomena Gomes, Per Ashorn, Sufia Askari, Jose M Belizan, Erick Boy, Gabriela Cormick, Katherine L Dickin, Amalia R Driller-Colangelo, Wafaie Fawzi, G Justus Hofmeyr and 10 more

Open access · hybridAbstract read
In one paragraph

Article in Annals of the New York Academy of Sciences, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed, 2 pooled it
11.6field-weighted citation impact, top 1% of its field
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

37 citing papers in PubMed, 2 syntheses or guidelines pooled it, 68 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Article
  5. The pathophysiology of pre-eclampsia.Nature reviews. Nephrology · 2026
    Review
  6. Article
  7. Observational
  8. Article
  9. Article
  10. Article
  11. Article
  12. Review
  13. Micronutrients in Obstetrics and Gynecology: Mini-Review Article.Journal of obstetrics and gynaecology of India · 2025
    Review
  14. Article
  15. Dietary supplements and prevention of preeclampsia.Hypertension research : official journal of the Japanese Society of Hypertension · 2025
    Review
  16. Review
  17. Low adherence to aspirin and calcium carbonate for preeclampsia prevention in pregnant women with chronic hypertension in a brazilian hospital.Revista brasileira de ginecologia e obstetricia : revista da Federacao Brasileira das Sociedades de Ginecologia e Obstetricia · 2025
    Article
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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

20 authors at 15 institutions in 10 countries.

Filomena GomesNutrition Science Program, New York Academy of Sciences, New York City, New York.ORCID 0000-0003-1702-1433
Per AshornFaculty of Medicine and Health Technology, Tampere University and Tampere University Hospital, Tampere, Finland.ORCID 0000-0003-2311-2593
Sufia AskariChildren's Investment Fund Foundation, London, UK.
Jose M BelizanInstitute for Clinical Effectiveness and Health Policy/CONICET, Buenos Aires, Argentina.
Erick BoyInternational Food Policy Research Institute, Washington, District of Columbia.ORCID 0000-0002-0271-1725
Gabriela CormickInstitute for Clinical Effectiveness and Health Policy/CONICET, Buenos Aires, Argentina.ORCID 0000-0001-7958-7358
Katherine L DickinCornell University, Ithaca, New York.ORCID 0000-0001-6268-5242
Amalia R Driller-ColangeloHarvard University, Cambridge, Massachusetts.
Wafaie FawziHarvard T.H. Chan School of Public Health, Boston, Massachusetts.
G Justus HofmeyrUniversity of Botswana, Gaborone, Botswana.
Jean HumphreyJohns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.
Anuradha KhadilkarHirabai Cowasji Jehangir Medical Research Institute, Pune, India.ORCID 0000-0002-3399-3235
Rubina MandlikHirabai Cowasji Jehangir Medical Research Institute, Pune, India.ORCID 0000-0002-4660-3013
Lynnette M NeufeldGlobal Alliance for Improved Nutrition, Geneva, Switzerland.ORCID 0000-0003-2652-9108
Cristina PalaciosFlorida International University, Miami, Florida.ORCID 0000-0001-9437-0376
Daniel E RothThe Hospital for Sick Children and University of Toronto, Toronto, Ontario, Canada.ORCID 0000-0001-7742-0925
Julie ShliskyNutrition Science Program, New York Academy of Sciences, New York City, New York.
Christopher R SudfeldHarvard T.H. Chan School of Public Health, Boston, Massachusetts.
Connie WeaverPurdue University, West Lafayette, Indiana.
Megan W BourassaNutrition Science Program, New York Academy of Sciences, New York City, New York.ORCID 0000-0003-1201-3397
New York Academy of Sciences · USConsejo Nacional de Investigaciones Científicas y Técnicas · ARHarvard University · USJehangir Hospital · INChildren's Investment Fund Foundation · GBCornell University · USFlorida International University · USGlobal Alliance for Improved Nutrition · CHHarvard University Press · USInternational Food Policy Research Institute · USJohns Hopkins University · USPurdue University West Lafayette · USTampere University Hospital · FIUniversity of Botswana · BWUniversity of Toronto · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Most low- and middle-income countries present suboptimal intakes of calcium during pregnancy and high rates of mortality due to maternal hypertensive disorders. Calcium supplementation during pregnancy is known to reduce the risk of these disorders and associated complications, including preeclampsia, maternal morbidity, and preterm birth, and is, therefore, a recommended intervention for pregnant women in populations with low dietary calcium intake (e.g., where ≥25% of individuals in the population have intakes less than 800 mg calcium/day). However, this intervention is not widely implemented in part due to cost and logistical issues related to the large dose and burdensome dosing schedule (three to four 500-mg doses/day). WHO recommends 1.5-2 g/day but limited evidence suggests that less than 1 g/day may be sufficient and ongoing trials with low-dose calcium supplementation (500 mg/day) may point a path toward simplifying supplementation regimens. Calcium carbonate is likely to be the most cost-effective choice, and it is not necessary to counsel women to take calcium supplements separately from iron-containing supplements. In populations at highest risk for preeclampsia, a combination of calcium supplementation and food-based approaches, such as food fortification with calcium, may be required to improve calcium intakes before pregnancy and in early gestation.

Indexed as

Hypertension, Pregnancy-InducedPre-EclampsiaPremature BirthCalciumCalcium, DietaryDietary SupplementsFemaleHumansInfant, NewbornPregnancyCalciumCalcium, Dietarycalcium deficiencycalcium supplementationhypertensive disorderspreeclampsiapregnancy

Identifiers

PMID35000200
PMCPMC9306576
OpenAlexW4206143653

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.