Evidence map›Paper›PMID 41502115›Full record

SynthesisBJU international2026

The role of 5-alpha reductase inhibitors in transurethral resection of the prostate: a meta-analysis of randomised controlled trials.

Cian M Hehir, Gavin G Calpin, Orla Cullivan, Gordon R Daly, Gavin P Dowling, Niall F Davis

Abstract readMeta-AnalysisReview
In one paragraph

Synthesis in BJU international, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed, 1 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

3 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Review
  3. 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

6 authors.

Cian M HehirDepartment of Surgery, Royal College of Surgeons, Dublin, Ireland.ORCID 0000-0001-8437-1447
Gavin G CalpinDepartment of Surgery, Royal College of Surgeons, Dublin, Ireland.
Orla CullivanDepartment of Surgery, Royal College of Surgeons, Dublin, Ireland.
Gordon R DalyDepartment of Surgery, Royal College of Surgeons, Dublin, Ireland.
Gavin P DowlingDepartment of Surgery, Royal College of Surgeons, Dublin, Ireland.
Niall F DavisDepartment of Urology, Beaumont Hospital, Dublin, Ireland.ORCID 0000-0002-5298-1475

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo critically evaluate the existing evidence base surrounding the efficacy of preoperative 5-alpha reductase inhibitor (5ARI) administration in the reduction of perioperative complication rates in transurethral resection of prostate (TURP).

methodsIn April 2025, a systematic search of on-line databases was conducted to identify randomised controlled trials (RCTs) that compared surgical outcomes and complication rates in patients undergoing TURP for benign prostatic hyperplasia (BPH) who were treated preoperatively with 5ARI (finasteride or dutasteride) as compared to placebo/none. The efficacy of preoperative finasteride was evaluated through outcomes related to blood loss, rate of blood transfusion, and operative time. The physiological mechanism of 5ARI treatment was evaluated through microvessel density (MVD) and vascular endothelial growth factor (VEGF) expression of the resected specimen.

resultsA total of 30 RCTs met the inclusion criteria for this meta-analysis in which a total of 2974 patients underwent TURP for BPH (1464 5ARI: 1410 Control). Intraoperative blood loss was significantly lower among 5ARI-treated patients (Z = 6.37, mean difference [MD] = -82.58 mL, 95% confidence interval [CI] -107.98 to -57.18; P < 0.001), which was reflected in a significantly lesser haemoglobin drop on the first postoperative day (Z = 6.84, MD = -0.90 g/dL, 95% CI-1.16 to -0.64; P < 0.001). The MVD was significantly lower in resected specimens from 5ARI-treated patients (MD = -6.18 vessels/mm

conclusionPreoperative administration of 5ARIs significantly reduces intraoperative blood loss and risk of requiring blood transfusion in patients undergoing TURP for BPH. Even short durations (2 weeks) of 5ARI therapy can significantly reduce prostate vascularity.

Indexed as

5-alpha Reductase InhibitorsPostoperative ComplicationsProstatic HyperplasiaTransurethral Resection of ProstateBlood Loss, SurgicalDutasterideFinasterideHumansMaleRandomized Controlled Trials as Topic5-alpha Reductase InhibitorsDutasterideFinasteride5‐alpha reductase inhibitorblood lossperioperative morbiditypostoperative complicationstransurethral resection of prostate

Identifiers

PMID41502115
PMCPMC12907782

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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.