Results
The data of 476 patients whose information was obtained and who underwent RRP were evaluated. The demographic data and basal PSA values of the first group with four-focus VUA and the second group with six-focus VUA were similar. The majority of the patients in both groups consisted of patients with Gleason score 3 + 3 and 3 + 4. Prostate volume and perioperative data were also similar between the two groups. There was no significant difference between the T stage of the prostatectomy specimens. Comparison of the demographic and perioperative data of the groups is summarized in Table 1 .
The proportion of patients with VUA stricture in the first group was significantly higher than in the second group (5.1% vs 3.2%, p = 0.017). Also, the mean time to stricture development was shorter in the first group (48.9 vs 74.3 days, p = 0.002). Although the continence rates in the sixth month decreased in both groups compared to the preoperative condition, the continence rate in the second group was higher than the first group (79.3% vs 62.8%, p <0.001). At 12 months, improvement in continence status was observed in both groups, but the second group had a higher rate of continence again (92.4% vs 81.3%, p = 0.032). Continence restoration curves for the two groups are shown in Figure 3 . The proportions of potent patients in the two groups tended to decrease at 6 months, but improvement was seen at 12 months. In addition, there was no significant difference between the two groups in terms of potent patient rates (p = 0.194 for the 6th month and p = 0.351 for the 12th month). The restoration curves comparing the potency rates of the two groups are schematized in Figure 4 . The comparison of the functional results of the two groups at 6 and 12 months is summarized in Table 2 .