Table 4 Comparison of urination before and after treatment between the two groups (n = 20, ‾x ± s)

Low volume group

preoperative

33.0 ± 36.3

20.6 ± 2.3

8.5 ± 1.3

4. 5 ± 0.6

postoperative

6.6 ± 7.8

9.5 ± 2.5

19. 8 ± 2.4

1. 9 ± 0.7

26.4 ± 30.3

11.1 ± 2.4

-11.3 ± 2.8

2.7 ± 1.2

t

3.885

20.829

18.822

10.025

P

0.000*

0.000*

0.000*

0.000

High volume group

preoperative

84.2 ± 118.0

21.4 ± 1.9

7.9 ± 1.7

4.8 ± 0.7

postoperative

13.8 ± 15.0

11.3 ± 2.6

18.8 ± 2.4

1.7 ± 0.6

70.4 ± 105.2

10. 1 ± 2.8

-10.9 ± 3.0

3.2 ± 0.2

t

2.993

16.419

16.403

11.917

P

0.007*

0.000*

0.000*

0.000*

t*

1.799

1.169

0.392

1.338

P

0.080

0.249

0.698

0.189