TABLE 3.

Comparison of adverse events.

	P (n = 96)	PD (n = 95)	p-Value
Number of patients with postoperative urinary retention (%)	11 (11.5%)	2 (2.1%)	0.01 a
Time of first postoperative urination, (h)	9.29 ± 4.39	9.43 ± 4.06	0.819 b
The number of people with numbness in their lower limbs (%)	43 (44.8%)	51 (53.7%)	0.219 a
Degree of numbness c	53/29/9/5	44/30/14/7	0.519 a
Time for the numbness to disappear, (h)	5.05 ± 6.81	8.01 ± 8.62	0.009 b
Number of people with PONV (%)	19 (19.8%)	16 (16.8%)	0.598 a
Number of rescue analgesics (%)
0–24 h	17 (17.7%)	21 (22.1%)	0.447 a
24–48 h	16 (16.8%)	12 (12.6%)	0.431 a
48–72 h	11 (11.5%)	9 (9.5%)	0.654 a

All values in the table represent the number or mean ± standard deviation.

NRS: numerical rating scale.

PONV: postoperative nausea and vomiting.

^a Indicates that the p-value is derived from the Pearson’s chi-squared test or Fisher’s test.

^b Indicates that the p-value is derived from the Student’s t-test.

^c The classification of numbness in the table is: None/Acceptable/Normal/Discomfort.