Evidence map›Paper›PMID 33179018›Full record

ArticleAndrogens: clinical research and therapeutics2020

Association of Leptin with Total and Free Testosterone: Results from the National Health and Nutrition Examination Surveys.

Thiago Fernandes Negris Lima, Sirpi Nackeeran, Evgeniya Rakitina, Gustavo Fernandes Negris Lima, Himanshu Arora, Atil Y Kargi, Ranjith Ramasamy

Abstract read
In one paragraph

Article in Androgens: clinical research and therapeutics, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
–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

12 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Review
  6. Review
  7. Adipose Tissue Dysfunction and Obesity-Related Male Hypogonadism.International journal of molecular sciences · 2022
    Review
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
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

7 authors.

Thiago Fernandes Negris LimaDepartment of Urology, University of Miami Miller School of Medicine, Miami, Florida, USA.
Sirpi NackeeranDepartment of Urology, University of Miami Miller School of Medicine, Miami, Florida, USA.
Evgeniya RakitinaDepartment of Urology, University of Miami Miller School of Medicine, Miami, Florida, USA.
Gustavo Fernandes Negris LimaMechanical Engineering, Federal University of Espirito Santo (UFES), Vitoria, Brazil.
Himanshu AroraDepartment of Urology, University of Miami Miller School of Medicine, Miami, Florida, USA.
Atil Y KargiThe Interdisciplinary Stem Cell Institute, Miller School of Medicine, University of Miami, Miami, Florida, USA.
Ranjith RamasamyDepartment of Urology, University of Miami Miller School of Medicine, Miami, Florida, USA.

Funding

Miami Clinical and Translational Science InstituteUL1TR002736 · NCATS · UNIVERSITY OF MIAMI SCHOOL OF MEDICINE · PI CARRASQUILLO, OLVEEN, KOBETZ, ERIN N · 2018 to 2022
$23.2M
NCATS NIH HHS UL1 TR002736
6 · The paper itself

Abstract

introductionObese men can have testosterone deficiency (TD) but the etiology is uncertain. Leptin is a 16-kDa protein produced primarily by adipose tissue and, therefore, is positively associated with the amount of body fat and can affect testosterone (T) production. We hypothesized that increased leptin can be independently associated with low T. MATERIALS AND

methodsWe performed a cross-sectional analysis of men from National Health and Nutrition Examination III database to evaluate the association of leptin with serum T and calculated free testosterone (cFT). Linear regression was performed with leptin, age, waist circumference, hypertension, and diabetes as independent variables predicting cFT/T. Multiple linear regression was used to determine predictors for cFT and T using variables previously significant in the univariate analysis.

resultsA total of 1193 men were analyzed. As expected, older and obese men were associated with having lower T. Interestingly, increasing leptin levels were an independent predictor of decreasing T and cFT on multivariable analysis. Increasing 1ng/mL in leptin resulted in a decrease of 5.13 and 0.11 ng/dL of T and cFT, respectively (

conclusionsWe concluded that increasing leptin, age, and waist circumference were associated with decreasing of T and cFT. Elevated leptin levels could be one of the potential etiologies of TD.

Indexed as

free testosteroneleptinNHANESobesitytestosterone

Identifiers

PMID33179018
PMCPMC7654971

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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.