Evidence map›Paper›PMID 34635516›Full record

ArticleBMJ open2021

Measurement of visceral fat and abdominal obesity by single-frequency bioelectrical impedance and CT: a cross-sectional study.

Zhengyang Xu, Yandong Liu, Chengxi Yan, Ruopei Yang, Li Xu, Zhe Guo, Aihong Yu, Xiaoguang Cheng, Lin Ma, Chunhong Hu and 2 more

Open access · goldAbstract read
In one paragraph

Article in BMJ open, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed, 2 pooled it
5.6field-weighted citation impact, top 3% 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

40 citing papers in PubMed, 2 syntheses or guidelines pooled it, 67 citations in OpenAlex.

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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

12 authors at 5 institutions in 3 countries.

Zhengyang XuDepartment of Radiology, the First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.
Yandong LiuDepartment of Radiology, Beijing Jishuitan Hospital and Fourth Medical College of Peking University, Beijing, China.ORCID 0000-0002-4752-9484
Chengxi YanDepartment of Radiology, Beijing Jishuitan Hospital and Fourth Medical College of Peking University, Beijing, China.
Ruopei YangDepartment of Radiology, Beijing Jishuitan Hospital and Fourth Medical College of Peking University, Beijing, China.
Li XuDepartment of Radiology, Beijing Jishuitan Hospital and Fourth Medical College of Peking University, Beijing, China.
Zhe GuoDepartment of Radiology, Beijing Jishuitan Hospital and Fourth Medical College of Peking University, Beijing, China.
Aihong YuDepartment of Radiology, Beijing Jishuitan Hospital and Fourth Medical College of Peking University, Beijing, China.
Xiaoguang ChengDepartment of Radiology, Beijing Jishuitan Hospital and Fourth Medical College of Peking University, Beijing, China.ORCID 0000-0002-4596-8248
Lin MaDepartment of Radiology, the First Medical Center of Chinese PLA General Hospital, Beijing, Beijing, China.
Chunhong HuDepartment of Radiology, the First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China hch5305@163.com.
Giuseppe GuglielmiDepartment of Clinical and Experimental Medicine, Foggia University School of Medicine, University Campus of Barletta, Dimiccoli Hospital, Foggia, Italy.
Karen HindDepartment of Sport and Exercise Sciences, Durham University, Durham, UK.
Peking University · CNChinese PLA General Hospital · CNDurham University · GBSoochow University · CNUniversity of Foggia · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThe measurement of visceral fat (VF) is clinically important for the identification of individuals at high risk of visceral obesity-related health conditions. Bioelectrical impedance analysis (BIA) is a widely available and frequently used body composition assessment method, but there have been few validation studies for the measurement of VF. This validation study investigated agreement between BIA and CT for the assessment of VF in adults.

designCross-sectional study.

settingBetween 2015 and 2016 in China.

participantsA total of 414 adults (119 men and 295 women) aged 40-82 years. PRIMARY AND SECONDARY OUTCOME MEASURES: CT-visceral fat area (VFA) was derived at the L2-3 and umbilicus level and VFA cut-offs for visceral obesity applied. BIA measurements of visceral fat level were compared with CT VFA findings using scatter plots and receiver operator characteristic (ROC) curves.

resultsScatter plots showed poor agreement between BIA and CT-derived visceral fat measurements in both sexes (R=0.387-0.636). ROC curves gave optimum figures for sensitivity and specificity of 65% and 69% in women and 76% and 70% in men, respectively, for BIA to discriminate between adults with normal levels of VF and those with visceral obesity determined by CT.

conclusionBIA has limited accuracy for the assessment of VF in adults in practice when compared with the criterion method.

Indexed as

Obesity, AbdominalAdultBody CompositionBody Mass IndexCross-Sectional StudiesElectric ImpedanceFemaleHumansIntra-Abdominal FatMaleTomography, X-Ray ComputedCTnutrition & dieteticspublic health

Identifiers

PMID34635516
PMCPMC8506854
OpenAlexW3205975848

What OpenQuestion holds

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LicenceCC BY-NC
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Registered trials

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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.