Evidence map›Paper›PMID 33607983›Full record

ArticleBMC women's health2021

Relationship between vitamin D receptor gene polymorphisms (BsmI, TaqI, ApaI, and FokI) and calcium intake on bone mass in young Japanese women.

Yuri Sakamoto, Fumi Oono, Kaoruko Iida, Pao-Li Wang, Yoichi Tachi

Open access · goldAbstract read
In one paragraph

Article in BMC women's health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
0.8field-weighted citation impact, top 31% 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

3 citing papers in PubMed, 6 citations in OpenAlex.

  1. Association between Serum Vitamin D Levels andJournal of dentistry (Shiraz, Iran) · 2026
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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

5 authors at 4 institutions in 1 country.

Yuri Sakamoto *Department of Clinical Dietetics and Human Nutrition, Faculty of Pharmacy and Pharmaceutical Sciences, Josai University, Saitama, Japan. sakamoto-y@josai.ac.jp.ORCID 0000-0002-0701-4101
Fumi Oono *Department of Nutrition and Food Science, Graduate School of Humanities and Sciences, Ochanomizu University, Tokyo, Japan.
Kaoruko IidaDepartment of Nutrition and Food Science, Graduate School of Humanities and Sciences, Ochanomizu University, Tokyo, Japan.
Pao-Li WangDepartment of Innovation in Dental Education, Osaka Dental University, Osaka, Japan.
Yoichi TachiLaboratory of Nutrition Physiology, Tokyo Kasei University, Tokyo, Japan.
Ochanomizu University · JPJosai University · JPOsaka Dental University · JPTokyo Kasei University · JP

Funding

the Ministry of Education, Culture, Sports, Science and Technology of Japan 18K17938
6 · The paper itself

Abstract

backgroundThe high prevalence of low bone mass in young women in Japan has emerged as a serious health issue in recent years. Therefore, the aim of the present study was to reevaluate the relationship between genetic and dietary factors, as well as its influence on bone mass in young Japanese women, with particular emphasis on vitamin D receptor (VDR) gene polymorphisms and calcium intake.

methodsA total of 499 Japanese women aged 20-24 years were enrolled in the study. The bone mass of the calcaneus was assessed using the quantitative ultrasound method and expressed as the osteo sono-assessment index (OSI). VDR gene polymorphisms (BsmI, TaqI, ApaI, and FokI) were analyzed using DNA extracted from saliva. Calcium intake was assessed using the Food Frequency Questionnaire based on food groups (FFQg) and adjusted with the energy intake. Participants were divided into two groups based on the median calcium intake (250 mg/1000 kcal).

resultsConsequently, bone mass was significantly different among the BsmI and TaqI genotypes after adjusting for body mass index (BMI) (p = 0.030 and 0.019, respectively). In addition, the BsmI AA and ApaI GT genotypes showed significant differences in bone mass between the calcium-intake groups, with low OSI in the low-calcium intake group and high OSI in the high-calcium intake group, respectively, even after adjusting for BMI (p = 0.020 and 0.038, respectively).

conclusionsThese findings may prove instrumental in developing a logical approach towards preventing bone loss in young Japanese women.

Indexed as

CalciumReceptors, CalcitriolBone DensityFemaleGenetic Predisposition to DiseaseGenotypeHumansJapanPolymorphism, GeneticCalciumReceptors, CalcitriolBone massCalcium intakeGenotypingOsteoporosisPremenopausal womenVitamin D receptor gene polymorphisms

Identifiers

PMID33607983
PMCPMC7893901
OpenAlexW3129265905

What OpenQuestion holds

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LicenceCC BY
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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.