Evidence map›Paper›PMID 29329201›Full record

ArticleNutrients2018

Population Reference Values for Serum Methylmalonic Acid Concentrations and Its Relationship with Age, Sex, Race-Ethnicity, Supplement Use, Kidney Function and Serum Vitamin B12 in the Post-Folic Acid Fortification Period.

Vijay Ganji, Mohammad R Kafai

Open access · goldAbstract read
In one paragraph

Article in Nutrients, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
1.4field-weighted citation impact, top 20% 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

22 citing papers in PubMed, 1 synthesis or guideline pooled it, 37 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Methylmalonic acid in aging and disease.Trends in endocrinology and metabolism: TEM · 2024
    Review
  12. Article
  13. Article
  14. Article
  15. Nonlinear associations of serum cobalamin with risk of all-cause and cardiovascular mortality in hypertensive adults.Hypertension research : official journal of the Japanese Society of Hypertension · 2023
    Article
  16. Review
  17. Macro-BBMJ case reports · 2022
    Article
  18. Article
  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

2 authors at 2 institutions in 2 countries.

Vijay GanjiHuman Nutrition Department, College of Health Sciences, Qatar University, P.O. Box 2713, Doha, Qatar. vganji@qu.edu.qa.
Mohammad R KafaiDepartment of Mathematics, San Francisco State University, San Francisco, CA 94132, USA. kafai@sfsu.edu.
Qatar University · QASan Francisco State University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Serum methylmalonic acid (MMA) is elevated in vitamin B-12 deficiency and in kidney dysfunction. Population reference values for serum MMA concentrations in post-folic acid fortification period are lacking. Aims of this study were to report the population reference values for serum MMA and to evaluate the relation between serum MMA and sex, age, race-ethnicity, kidney dysfunction and vitamin B-12. We used data from three National Health and Nutrition Examination Surveys, 1999-2000, 2001-2002 and 2003-2004 conducted after folic acid fortification commenced (

Indexed as

Dietary SupplementsFood, FortifiedAdolescentAdultAgedAge FactorsChildCreatinineEthnicityFemaleFolic AcidHumansKidneyMaleMethylmalonic AcidMiddle AgedCreatinineFolic AcidMethylmalonic AcidVitamin B 12agecobalamincreatininemethylmalonic acidMMANational Health and Examination SurveyNHANESrace-ethnicityreference valuesvitamin B-12

Identifiers

PMID29329201
PMCPMC5793302
OpenAlexW2783674796

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.