Evidence map›Paper›PMID 34308318›Full record

ArticleEClinicalMedicine2021

Vitamin D status in Mainland of China: A systematic review and meta-analysis.

Wenhua Liu, Jing Hu, Yuanyuan Fang, Peng Wang, Yanjun Lu, Na Shen

Open access · goldAbstract read
In one paragraph

Article in EClinicalMedicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed, 6 pooled it
4.9field-weighted citation impact, top 4% 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, 6 syntheses or guidelines pooled it, 49 citations in OpenAlex.

  1. Pooled it
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  7. Effect of vitamin DJournal of the International Society of Sports Nutrition · 2023
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  11. Effects of Age, Season, and Pregnancy History on Vitamin D Status in Women Seeking Preconception Care.Medical science monitor : international medical journal of experimental and clinical research · 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

6 authors at 1 institution in 1 country.

Wenhua LiuClinical Research Center,Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, China.
Jing HuDepartment of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, HUST, Wuhan, China.
Yuanyuan FangDepartment of Neurology, Tongji Hospital,Tongji Medical College, HUST, Wuhan, China.
Peng WangInstitute and Department of Infectious Disease, Tongji Hospital, Tongji Medical College, HUST, Wuhan, China.
Yanjun LuDepartment of Laboratory Medicine, Tongji Hospital, Tongji Medical College, HUST, Wuhan, China.
Na ShenDepartment of Laboratory Medicine, Tongji Hospital, Tongji Medical College, HUST, Wuhan, China.
Tongji Hospital · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundLow vitamin D (VitD) status is becoming a global health issue. Previous heterogenous results are urging a meta-analysis to delineate a panorama of VitD conditions in the general population in Mainland of China.

methodsWe performed a systematic review and meta-analysis by searching PubMed, Web of Science, EMBASE, China National Knowledge Infrastructure, WanFang, and VIP databases up to June 4, 2021. The inclusion criteria were as follows: (1) original articles or dissertations focused on VitD status of people in Mainland of China; and (2) studies were population-based, cross-sectional, or longitudinal cohort with baseline data. The outcomes were serum 25(OH)D concentration and the prevalence of low VitD status. Low VitD status included VitD deficiency (< 30 nmol/L) and VitD inadequacy (< 50 nmol/L). Data were estimated by Hierarchical Bayesian methods. All included studies were cross-sectional or longitudinal cohort studies about VitD status of people in Mainland of China. (Registration: PROSPERO CRD42021226130).

findingsA total of 105 eligible studies including 234,519 subjects were included. In adults, the overall mean 25(OH)D concentration was 44.3 nmol/L (95% Credible Interval [CrI]: 39.8-48.7). The pooled prevalence of VitD deficiency and inadequacy was 20.7% (95% CrI: 11.9-32.9) and 63.2% (95% CrI: 53.5-72.3), respectively. In children and adolescents, the overall mean 25(OH)D concentration was 52.2 nmol/L (95% CrI: 46.7-57.5). The pooled prevalence of VitD deficiency and inadequacy was 23.0% (95% CrI: 8.9-44.3) and 46.8% (95% CrI: 37.2-56.6), respectively. Specially, we identified that the prevalence of VitD inadequacy increased with age in populations with age ≤ 18 years and ≥ 60 years.

interpretationLow VitD status is prominent in general population of Mainland of China, especially for adults.

fundingNational Major Scientific and Technological Special Project for "Significant New Drugs Development" (2017ZX09304022).

Indexed as

DeficiencyMainland of ChinaMeta-analysisSystematic reviewVitamin D

Identifiers

PMID34308318
PMCPMC8283334
OpenAlexW3181209874

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.