Table 1 Baseline characteristics and VAS pain scores according to the PNB sites

N

151 (49.7)

153 (50.3)

Age (years)

67.86 ± 15.74

68.19 ± 8.59

0.740

PSA (ng/mL)

7.56 (5.40–11.59)

6.76 (4.47–10.19)

0.074

Prostate volume (mL)

36.55 ± 15.74

36.79 ± 16.78

0.900

History of prostate biopsy (n, %)

27 (17.9)

19 (12.4)

0.186

Positive DRE (n, %)

35 (35.7)

25 (28.4)

0.287

Prostate cancer detection rate (n, %)

95 (62.9)

95 (62.1)

0.882

Gleason score

0.171

6 (n, %)

18 (18.9)

26 (27.4)

≥ 7 (n, %)

77 (81.1)

69 (72.6)

Pain

Probe insertion

3.39 ± 2.12

3.36 ± 2.43

0.905

PNB at base

2.91 ± 1.83

2.79 ± 1.94

0.591

PNB at apex

4.60 ± 2.50

At 15 min post prostate biopsy

0.14 ± 0.58

0.16 ± 0.74

0.749

Time

Periprostatic nerve block (min)

2.42 ± 0.77

2.59 ± 0.88

0.084

Prostate biopsy (min)

4.20 ± 2.59

4.66 ± 5.41

0.343

Adverse events

Vasovagal syncope (n, %)

2 (1.3)

0 (0.0)

0.246

Allergic reaction (n, %)

0 (0.0)

0 (0.0)

–

AUR (n, %)

0 (0.0)

0 (0.0)

–

Urinary retention because of blood clot (n, %)

0 (0.0)

0 (0.0)

–

Fever (n, %)

0 (0.0)

0 (0.0)

–