To evaluate impacts of preoperative detrusor underactivity (DU) on outcomes of PVP or HoLEP for BPH, and to compare them between the two surgeries.
A total of 1,423 men, who underwent PVP (group A) or HoLEP (group B), were categorized into four groups: A1 (239 without DU), A2 (432 with DU), B1 (329 without DU) and B2 (423 with DU).