Evidence map›Paper›PMID 34226825›Full record

ArticleFrontiers in endocrinology2021

Testosterone Deficiency Is a Risk Factor for Severe COVID-19.

Lukas Lanser, Francesco Robert Burkert, Lis Thommes, Alexander Egger, Gregor Hoermann, Susanne Kaser, Germar Michael Pinggera, Markus Anliker, Andrea Griesmacher, Günter Weiss and 1 more

Open access · goldAbstract read
In one paragraph

Article in Frontiers in endocrinology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed, 3 pooled it
3.4field-weighted citation impact, top 6% 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

32 citing papers in PubMed, 3 syntheses or guidelines pooled it, 60 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Trial
  5. Testicular endocrine function recovers following Fournier's gangrene.American journal of clinical and experimental urology · 2026
    Article
  6. Sex Steroids in COVID-19 Patients with Hypertension: An Exploratory Study.International journal of molecular sciences · 2025
    Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Effect of Pituitary-Target Gland Axis on RAAS in the Context of COVID-19.International journal of medical sciences · 2025
    Review
  12. Article
  13. Article
  14. SARS-CoV-2 and male infertility: from short- to long-term impacts.Journal of endocrinological investigation · 2023
    Review
  15. Review
  16. Review
  17. Review
  18. Article
  19. SARS-CoV-2, fertility and assisted reproduction.Human reproduction update · 2023
    Review
  20. Review
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

11 authors at 3 institutions in 2 countries.

Lukas LanserDepartment of Internal Medicine II, Innsbruck Medical University, Innsbruck, Austria.
Francesco Robert BurkertDepartment of Internal Medicine II, Innsbruck Medical University, Innsbruck, Austria.
Lis ThommesDepartment of Internal Medicine II, Innsbruck Medical University, Innsbruck, Austria.
Alexander EggerCentral Institute for Medical and Chemical Laboratory Diagnosis, Innsbruck University Hospital, Innsbruck, Austria.
Gregor HoermannCentral Institute for Medical and Chemical Laboratory Diagnosis, Innsbruck University Hospital, Innsbruck, Austria.
Susanne KaserDepartment of Internal Medicine I, Innsbruck Medical University, Innsbruck, Austria.
Germar Michael PinggeraDepartment of Urology, Innsbruck Medical University, Innsbruck, Austria.
Markus AnlikerCentral Institute for Medical and Chemical Laboratory Diagnosis, Innsbruck University Hospital, Innsbruck, Austria.
Andrea GriesmacherCentral Institute for Medical and Chemical Laboratory Diagnosis, Innsbruck University Hospital, Innsbruck, Austria.
Günter WeissDepartment of Internal Medicine II, Innsbruck Medical University, Innsbruck, Austria.
Rosa Bellmann-WeilerDepartment of Internal Medicine II, Innsbruck Medical University, Innsbruck, Austria.
Innsbruck Medical University · ATUniversity Hospital Innsbruck · ATMunich Leukemia Laboratory (Germany) · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Male sex is related to increased COVID-19 severity and fatality although confirmed infections are similarly distributed between men and women. The aim of this retrospective analysis was to investigate the impact of sex hormones on disease progression and immune activation in men with COVID-19. Patients and Methods: We studied for effects of sex hormones on disease severity and immune activation in 377 patients (230 men, 147 women) with PCR-confirmed SARS-CoV-2 infections hospitalized at the Innsbruck University Hospital between February and December 2020. Results: Men had more severe COVID-19 with concomitant higher immune system activation upon hospital admission when compared to women. Men with a severe course of infection had lower serum total testosterone (tT) levels whereas luteinizing hormone (LH) and estradiol (E Conclusion: Hospitalized men with COVID-19 present with rather low testosterone levels linked to more advanced immune activation, severe clinical manifestations translating into an increased risk for ICU admission or death. The underlying mechanisms remain elusive but may include infection driven hypogonadism as well as inflammation mediated cholesterol reduction causing gonadotropin suppression and impaired androgen formation. Finally, in elderly late onset hypogonadism might also contribute to lower testosterone levels.

Indexed as

Severity of Illness IndexAgedCOVID-19FemaleHumansMaleMiddle AgedRetrospective StudiesRisk FactorsTestosteroneTestosteroneCOVID-19disease severityestradiolinflammationoutcomeSARS-CoV-2testosterone

Identifiers

PMID34226825
PMCPMC8253686
OpenAlexW3174514762

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.