Evidence map›Paper›PMID 40761851›Full record

SynthesisFrontiers in medicine2025

Comparison of single-spin to double-spin platelet-rich plasma centrifugation methods in the treatment of androgenic alopecia: a systematic review and meta-analysis of randomized controlled trials.

Laura Ghanem, Najwaa Kirmani, María Paula Palacios-Ortiz, Martin Cevallos-Cueva, Daniela Lucía Mendoza-Millán, Gabriel Victor Almeida Nascimento, Virginia Velasco-Tamariz

Abstract readSystematic Review
In one paragraph

Synthesis in Frontiers in medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing 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

6 citing papers in PubMed.

  1. Article
  2. Article
  3. Review
  4. Article
  5. Article
  6. 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

7 authors.

Laura GhanemFaculty of Medical Sciences, Lebanese University, Beirut, Lebanon.
Najwaa KirmaniDow Medical College, Karachi, Pakistan.
María Paula Palacios-OrtizSchool of Medicine, Universidad San Francisco de Quito, Quito, Ecuador.
Martin Cevallos-CuevaSchool of Medicine, Universidad Central del Ecuador, Quito, Ecuador.
Daniela Lucía Mendoza-MillánDepartment of Dermatology, Harvard Medical School, Boston, MA, United States.
Gabriel Victor Almeida NascimentoFaculty of Medicine, Universidade Ceuma Campus Imperatriz, Imperatriz, Maranhão, Brazil.
Virginia Velasco-TamarizDermatology Department, Hospital Universitario 12 de Octubre, I+12 Research Institute, Universidad Complutense de Madrid, Madrid, Spain.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Androgenic alopecia (AGA) is the most common hair loss disease, caused by a combination of genetic factors and hormonal imbalances. Platelet-rich plasma (PRP) therapy has gained significant recognition in treating AGA, but optimal treatment protocol regarding centrifugation techniques has yet to reach a standardized consensus. We aim to conduct a systematic review and meta-analysis of randomized controlled trials (RCTs) to compare the efficacy of single-spin versus double-spin centrifugation protocols for PRP in patients with AGA. Methods: We searched PubMed, Embase, and Cochrane for RCTs comparing single-spin to double-spin PRP in AGA patients. The primary endpoint was the final platelets count after centrifugation. Secondary endpoints included improvement in hair density, as well as terminal and vellus hair rate. Statistical analysis was performed using RStudio software. Heterogeneity was assessed with Results: We included 90 participants with AGA from three RCTs. The pooled mean difference (MD) for platelets concentration was 66.14 in single-spin compared to double-spin PRP (95% CI: -372.96 to 505.25; Conclusion: Our study suggests that single-spin PRP centrifugation is better in treating AGA patients compared to double-spin PRP. Systematic review registration: https://www.crd.york.ac.uk/PROSPERO/view/CRD42025643296, identifier CRD42025643296.

Indexed as

androgenic alopeciacentrifugationdouble-spinplatelet-rich plasmasingle-spin

Identifiers

PMID40761851
PMCPMC12318733

What OpenQuestion holds

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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.