Evidence map›Paper›PMID 26729160›Full record

ReviewNutrients2016

Concepts and Controversies in Evaluating Vitamin K Status in Population-Based Studies.

M Kyla Shea, Sarah L Booth

Open access · goldAbstract readReview
In one paragraph

Review in Nutrients, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 87 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
87citing papers in PubMed, 4 pooled it
19.1field-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

87 citing papers in PubMed, 4 syntheses or guidelines pooled it, 190 citations in OpenAlex.

  1. Pooled it
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  4. Effect of vitamin K on bone mineral density and fractures in adults: an updated systematic review and meta-analysis of randomised controlled trials.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2019
    Pooled it
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27 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

2 authors at 1 institution in 1 country.

M Kyla SheaUSDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA 02111, USA.
Sarah L BoothUSDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA 02111, USA. sarah.booth@tufts.edu.
Tufts University · US

Funding

Vitamin K: vascular calcification and age-related bone *R01HL069272 · NHLBI · TUFTS UNIVERSITY BOSTON · PI BOOTH, SARAH LOUISE · 2001 to 2004
$1.0M
VITAMIN K INSUFFICIENCY--A RISK FACTOR FOR OSTEOPOROSISR01AG014759 · NIA · TUFTS UNIVERSITY BOSTON · PI BOOTH, SARAH · 1998 to 2001
$610k
Identifying Vitamin K Dependent Pathways in Osteoarthritis ProgressionK01AR063167 · NIAMS · WAKE FOREST UNIVERSITY HEALTH SCIENCES · PI SHEA, MARY KYLA · 2012 to 2015
$455k
Vitamin K, Knee Osteoarthritis, and Physical Function in Older AdultsR21AR062284 · NIAMS · WAKE FOREST UNIVERSITY HEALTH SCIENCES · PI KRITCHEVSKY, STEPHEN B., LOESER, RICHARD F · 2012 to 2013
$370k
NHLBI NIH HHS R01 HL069272NHLBI NIH HHS R01HL69272NIAMS NIH HHS K01 AR063167NIAMS NIH HHS K01AR063167NIAMS NIH HHS R21 AR062284NIAMS NIH HHS R21AR062284NIA NIH HHS R01AG14759
6 · The paper itself

Abstract

A better understanding of vitamin K's role in health and disease requires the assessment of vitamin K nutritional status in population and clinical studies. This is primarily accomplished using dietary questionnaires and/or biomarkers. Because food composition databases in the US are most complete for phylloquinone (vitamin K1, the primary form in Western diets), emphasis has been on phylloquinone intakes and associations with chronic diseases. There is growing interest in menaquinone (vitamin K2) intakes for which the food composition databases need to be expanded. Phylloquinone is commonly measured in circulation, has robust quality control schemes and changes in response to phylloquinone intake. Conversely, menaquinones are generally not detected in circulation unless large quantities are consumed. The undercarboxylated fractions of three vitamin K-dependent proteins are measurable in circulation, change in response to vitamin K supplementation and are modestly correlated. Since different vitamin K dependent proteins are implicated in different diseases the appropriate vitamin K-dependent protein biomarker depends on the outcome under study. In contrast to other nutrients, there is no single biomarker that is considered a gold-standard measure of vitamin K status. Most studies have limited volume of specimens. Strategic decisions, guided by the research question, need to be made when deciding on choice of biomarkers.

Indexed as

Nutritional StatusNutrition AssessmentBiomarkersHumansProteinsVitamin KBiomarkersProteinsVitamin Kbiomarkersepidemiologyreviewvitamin Kvitamin K intake

Identifiers

PMID26729160
PMCPMC4728622
OpenAlexW2196930892

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.