Table 3.

Comparison of prostate volume at bladder volume V1 and V4

Number of cases	Prostatic volume(mL) at 50–99 mL urine volume (V1c)	Prostatic volume (mL) at 300–399 mL urine volume (V4)	Volume diff/mL V1c–V4
1.	14.66	18.63	−3.97
2.	31.99	32.34	−0.35
3.	23.67	19.86	3.81
4.	17.30	14.31	2.99
5.	36.36	36.06	0.3
6.	26.72	42.40	−15.68
7.	62.35	61.10	1.25
8.	31.47	31.22	0.25
9.	26.86	24.32	2.54
10.	14.34	16.06	−1.72
11.	27.35	22.38	4.97
12.	23.36	24.70	−1.34
13.	23.68	27.74	−4.06
14.	38.70	36.46	2.24
15.	33.30	17.49	15.81
16.	36.43	36.39	0.04
17.	33.40	32.60	0.8
18.	63.90	68.50	−4.6
Mean	31.44	31.25	P = 0.899