Table 1.

Comparison of prostate volume at bladder volume V1 and V2

Number of cases	Prostatic volume(mL) at 50–99 mL urine volume (V1a)	Prostatic volume(mL) at 100–199 mL urine volume (V2)	Volume diff/mL V1a–V2
1.	16.08	15.79	0.29
2.	67.61	80.09	−12.48
3.	22.98	22.55	0.43
4.	40.48	41.22	−0.74
5.	76.82	98.69	−21.87
6.	26.86	24.82	2.04
7.	82.03	105.68	−23.65
8.	23.67	24.00	−0.33
9.	31.00	21.00	10
10.	117.02	141.15	−24.13
11.	28.37	32.13	−3.76
12.	41.45	59.66	−18.21
13.	86.37	92.03	−5.66
14.	36.45	38.67	−2.22
15.	22.8	31.90	−9.1
16.	23.59	17.96	5.63
17.	53.10	59.2	−6.1
18.	43.60	32.0	11.6
19.	50.1	57.5	−7.4
20.	25.5	26.8	−1.3
21.	67.8	69.7	−1.9
22.	73.57	75.0	−1.43
23.	40.86	61.20	−20.34
24.	34.59	37.42	−2.83
25.	54.04	90.75	−36.71
26.	23.83	39.18	−15.35
27.	23.36	25.79	−2.43
28.	121.96	101.76	20.2
29.	59.63	47.33	12.3
30.	55.13	57.08	−1.95
31.	46.80	60.20	−13.4
Mean	48.95	54.46	P = 0.017