Radwan 2020.

Study characteristics
Methods	Study design: parallel randomized controlled study Setting/Country: single center/Egypt Dates when study was conducted: January 2016 to January 2018
Participants	Inclusion criteria: men with LUTS with an IPSS score 8–35 (8 being moderate and 35 being severe), uroflowmetry with a mean flow ≤ 10 mL/second, and a prostate volume < 100 mL by TRUS Exclusion criteria: men with elevated kidney functions (1.5 mg/dL), with allergy to intravenous contrast media, unfit for surgery, with prostatic adenocarcinoma, with history of prostatic or urethral operations, with signs of the decompensated bladder (e.g. bladder diverticulum), with signs of upper urinary tract infection revealed by pelvic abdominal US were excluded Total number of participants randomly assigned: 60 Group A (PAE) Number of all participants randomly assigned: 20 Age (years): 63.0 (SD 7.2) Prostate volume (mL): 58.7 (SD 23.4) PSA (ng/mL): not reported IPSS: 27.0 (SD 5.0) Qmax (mL/second): 9.2 (SD 4.8) Group B (TURP) Number of all participants randomly assigned: 40 Age (years): 62.0 (SD 9.0) Prostate volume (mL): 60.1 (SD 21.5) PSA (ng/mL): not reported IPSS: 26.5 (SD 4.0) Qmax (mL/second): 8.3 (SD 5.7)
Interventions	Group A: PAE Group B: TURP (monopolar or bipolar) Follow‐up: 6 months
Outcomes	IPSS How measured: IPSS questionnaire/uroflowmetry/TRUS/not reported Time points measured: at baseline, 1 month, and 6 months Time points reported: at baseline, 1 month, and 6 months Qmax, prostate volume, PVR How measured: uroflowmetry/TRUS/NR Time points measured: at baseline, 1 month, and 6 months Time points reported: at baseline and postoperatively (not defined) Safety outcomes: How measured: TUR syndrome, acute urinary retention, postembolization syndrome Time points measured: not reported Time points reported: likely cumulative incidence Subgroup: none
Funding sources	Not reported
Declarations of interest	None
Notes	Protocol: not available Language of publication: English
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Judgment: not described.
Allocation concealment (selection bias)	Unclear risk	Judgment: not described.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Judgment: not described; blinding highly unlikely to have taken place.
Blinding of outcome assessment (detection bias) Subjective outcomes	High risk	Judgment: not described; blinding highly unlikely to have taken place.
Blinding of outcome assessment (detection bias) Objective outcomes	Low risk	Judgment: objective outcomes likely not affected by lack of blinding.
Incomplete outcome data (attrition bias) Urologic symptom scores/QoL	Low risk	Judgment: all randomized participants were included in the analysis.
Incomplete outcome data (attrition bias) Major/minor adverse events	Low risk	Judgment: all randomized participants were included in the analysis.
Incomplete outcome data (attrition bias) Retreatment	Low risk	Judgment: all randomized participants were included in the analysis.
Incomplete outcome data (attrition bias) Erectile function	Unclear risk	Judgment: no information given (not measured).
Incomplete outcome data (attrition bias) Ejaculatory disorders	Unclear risk	Judgment: no information given (not measured).
Incomplete outcome data (attrition bias) Acute urinary retention	Low risk	Judgment: all randomized participants were included in the analysis.
Incomplete outcome data (attrition bias) Indwelling urinary catheter	Low risk	Judgment: all randomized participants were included in the analysis (catheter removal time: TURP [third postoperative day], PAE [fifth postoperative day]).
Incomplete outcome data (attrition bias) Hospital stay	Unclear risk	Judgment: no information given (not measured).
Selective reporting (reporting bias)	Unclear risk	Judgment: protocol was not found, the outcomes at prespecified time point (likely 1 month) were omitted
Other bias	Low risk	Judgment: not detected.