Evidence map›Paper›PMID 25982806›Full record

SynthesisObesity surgery2016

Changes in Bone Metabolism in Morbidly Obese Patients After Bariatric Surgery: A Meta-Analysis.

Cong Liu, Dan Wu, Jing-Fan Zhang, Duo Xu, Wan-Feng Xu, Yu Chen, Bing-Yang Liu, Ping Li, Ling Li

Abstract readMeta-AnalysisReview
PubMed Publisher
In one paragraph

Synthesis in Obesity surgery, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers, 8 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed, 8 pooled it
–field-weighted citation impact
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

73 citing papers in PubMed, 8 syntheses or guidelines pooled it.

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  4. Changes in volumetric bone mineral density and bone quality after Roux-en-Y gastric bypass: A meta-analysis with meta-regression.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2022
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  13. The Short-Term Impact of Sleeve Gastrectomy on Bone Health.Mediterranean journal of rheumatology · 2025
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13 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

9 authors.

Cong LiuDepartment of Endocrinology, Shengjing Hospital of China Medical University, No. 39, Huaxiang Road, Tiexi District, Shenyang, 110022, Liaoning, People's Republic of China. liuc_sjhospital@163.com.
Dan WuNo. 2 Department of Rheumatology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, People's Republic of China. crystal0553@163.com.
Jing-Fan ZhangDepartment of Endocrinology, Shengjing Hospital of China Medical University, No. 39, Huaxiang Road, Tiexi District, Shenyang, 110022, Liaoning, People's Republic of China. fanfanmail2@126.com.
Duo XuDepartment of Endocrinology, Shengjing Hospital of China Medical University, No. 39, Huaxiang Road, Tiexi District, Shenyang, 110022, Liaoning, People's Republic of China. xud1@sj-hospital.org.
Wan-Feng XuDepartment of Endocrinology, Shengjing Hospital of China Medical University, No. 39, Huaxiang Road, Tiexi District, Shenyang, 110022, Liaoning, People's Republic of China. xuwf@sj-hospital.org.
Yu ChenDepartment of Endocrinology, Shengjing Hospital of China Medical University, No. 39, Huaxiang Road, Tiexi District, Shenyang, 110022, Liaoning, People's Republic of China. 037602@163.com.
Bing-Yang LiuDepartment of Endocrinology, Shengjing Hospital of China Medical University, No. 39, Huaxiang Road, Tiexi District, Shenyang, 110022, Liaoning, People's Republic of China. 119lby@163.com.
Ping LiDepartment of Endocrinology, Shengjing Hospital of China Medical University, No. 39, Huaxiang Road, Tiexi District, Shenyang, 110022, Liaoning, People's Republic of China. s6800@163.com.
Ling LiDepartment of Endocrinology, Shengjing Hospital of China Medical University, No. 39, Huaxiang Road, Tiexi District, Shenyang, 110022, Liaoning, People's Republic of China. liling@sj-hospital.org.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe aim is to evaluate via meta-analysis bone metabolism and bone mineral density (BMD) in morbidly obese patients before and after bariatric surgery.

methodsWe searched Medline, EMBASE, and the Cochrane Library for relevant studies published before January 2014. The following outcomes were evaluated: serum calcium, serum parathyroid hormone (PTH), serum 25-hydroxyvitamin D [25(OH)D], serum or urinary N-telopeptide (NTX), bone-specific alkaline phosphatase (BSAP), and bone mineral density (BMD).

resultsTen studies, including 344 patients, met our inclusion criteria. Results showed a significant decrease in serum calcium (MD = -0.10, 95 %CI -0.14 to -0.07, P < 0.00001) and increase in serum PTH (MD = 12.41, 95 %CI 6.51 to 18.31, P < 0.00001) but no significant difference in serum 25(OH)D (MD = 1.35, 95 %CI -1.12 to 3.83, P = 0.28) following bariatric surgery. There were significant increases in serum or urinary NTX (MD = 18.49, 95 %CI 3.33 to 33.66, P = 0.02) and BSAP (MD = 7.47, 95 %CI 0.21 to 14.72, P = 0.04) but a significant decrease in BMD (MD = -0.08, 95 %CI -0.13 to -0.04, P < 0.00001) after bariatric surgery.

conclusionBMD was significantly decreased, while bone turnover was elevated, and bone remodeling was accelerated following bariatric surgery. Basal bone metabolism should be evaluated preoperatively. To prevent secondary hyperparathyroidism and bone loss, calcium and vitamin D should be monitored closely and supplemented accordingly after the surgery.

Indexed as

Bariatric SurgeryBone DensityBone RemodelingAlkaline PhosphataseCalciumCollagen Type IHumansObesity, MorbidParathyroid HormonePeptidesVitamin D25-hydroxyvitamin DAlkaline PhosphataseCalciumCollagen Type Icollagen type I trimeric cross-linked peptideParathyroid HormonePeptidesVitamin DBariatric surgeryBone metabolismBone mineral densityMorbid obesityOsteoporosis

Identifiers

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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.