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Comparison of mean and standard deviation of residual urine volume in the two groups
| Variable | Group | Mean | Standard deviation | Average rating | Total rank | Middle | Mann–Whitney U | P |
|---|---|---|---|---|---|---|---|---|
| Volume of urine remaining in the bladder (cm3) | Tamsulosin | 58/61 | 122/2 | 59/86 | 3891 | 00/00 | 1746 | 0/032 |
| Placebo | 110/15 | 150 | 71/14 | 4624 | 00/00 |
