Lower Dose of 5 mL of 1% Lidocaine is More Suitable than the Conventional 10 mL for Caudal Block in Transrectal Prostate Biopsy: A Retrospective Cohort Study

Table 4

Results of pain scale score evaluation for caudal block, prostate biopsy, and anal sphincter tonus relaxation.

	1% lidocaine, 5 mL; (n = 395)	1% lidocaine, 10 mL; (n = 395)	value
NRS pain score of caudal block, median (IQR)	2.0 (2.0–5.0)	2.0 (2.0–5.0)	0.91
NRS pain score of prostate biopsy, median (IQR)	2.0 (2.0–5.0)	2.0 (2.0–4.0)	0.12
Anal sphincter tonus score, median (IQR)	1.0 (0–1.0)	1.0 (0–1.0)	0.28

NRS pain score and anal sphincter tonus score were analyzed using the Mann–Whitney U test. NRS, numerical rating scale; IQR, interquartile range.