Evidence map›Paper›PMID 25889408›Full record

SynthesisLipids in health and disease2015

Effect of conjugated linoleic acid on blood pressure: a meta-analysis of randomized, double-blind placebo-controlled trials.

Jing Yang, Hai-Peng Wang, Ling-Mei Zhou, Li Zhou, Tan Chen, Li-Qiang Qin

Open access · goldAbstract readMeta-Analysis
In one paragraph

Synthesis in Lipids in health and disease, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
2.2field-weighted citation impact, top 13% 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

7 citing papers in PubMed, 1 synthesis or guideline pooled it, 31 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Article
  4. Review
  5. Review
  6. Article
  7. Observational
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 2 institutions in 1 country.

Jing YangDepartment of Nutrition and Food Hygiene, School of Public Health, Soochow University, 199 Renai Road, Dushu Lake Higher Education Town, Suzhou, 215123, China. 82056512@qq.com.
Hai-Peng WangDepartment of Cardiology, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, China. 14535251@qq.com.
Ling-Mei ZhouDepartment of Nutrition and Food Hygiene, School of Public Health, Soochow University, 199 Renai Road, Dushu Lake Higher Education Town, Suzhou, 215123, China. 1179617770@qq.com.
Li ZhouDepartment of Clinical Nutrition, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, China. szzl_p@126.com.
Tan ChenDepartment of Cardiology, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, China. chentan1234@sina.com.
Li-Qiang QinDepartment of Nutrition and Food Hygiene, School of Public Health, Soochow University, 199 Renai Road, Dushu Lake Higher Education Town, Suzhou, 215123, China. qinliqiang@suda.edu.cn.
Soochow University · CNFirst Affiliated Hospital of Soochow University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundNumerous studies on animals evidenced that conjugated linoleic acid (CLA) could decrease blood pressure (BP) in several rat models. However, such beneficial effect is not completely supported by studies on humans.

methodsWe searched the Pubmed, Cochrane Library, and the ClinicalTrials.gov databases for relevant randomized, double-blind placebo-controlled trials up to August 2014 to perform a meta-analysis. A random-effects model was used to calculate the combined treatment effects.

resultsEight studies with nine trials, which involved 638 participants with CLA supplementation ranging from 2.0 g/day to 6.8 g/day, were included in this meta-analysis. Compared with placebo, the pooled estimate of change was -0.03 mm Hg (95% CI: -2.29, 2.24, P=0.98) and 0.69 mm Hg (95% CI: -1.41, 2.80, P=0.52) in systolic and diastolic BPs, respectively. No significant heterogeneity across studies for systolic BP; however, substantial heterogeneity for diastolic BP was identified. Publication bias was not found for both systolic and diastolic BPs.

conclusionThe findings of this meta-analysis did not support the overall favorable effect of CLA supplementation on BP regulation.

Indexed as

AdultAntihypertensive AgentsBlood PressureDouble-Blind MethodFemaleHumansHypertensionLinoleic Acids, ConjugatedMaleMiddle AgedRandomized Controlled Trials as TopicAntihypertensive AgentsLinoleic Acids, Conjugated

Identifiers

PMID25889408
PMCPMC4339427
OpenAlexW2152341514

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.