Table 2 Variations in bladder volume for all patients. The group x means number of treatments (x − 1) * 5 + 1 ~ (x − 1) * 5 + 5
|  | All patients | Group1 (1–5) | Group2 (6–10) | Group3 (11–15) | Group4 (16–20) | Group5 (21–25) | Group6 (26–30) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|  | Mean | σ | Mean | σ | Mean | σ | Mean | σ | Mean | σ | Mean | σ | Mean | σ |
Treat time (ml) | 26.84 | 6.94 | 27.65 | 8.20 | 27.18 | 7.29 | 27.00 | 6.87 | 26.34 | 5.59 | 23.96 | 4.76 | 28.69 | 5.72 |
Vpre − Vplan (ml) |  − 96.88 | 143.46 |  − 97.98 | 169.11 |  − 92.52 | 139.66 |  − 75.33 | 141.14 |  − 99.89 | 99.52 | − 112.27 | 155.17 | − 140.72 | 112.66 |
Vpost – Vplan (ml) |  − 10.52 | 152.88 |  − 2.64 | 176.17 | 8.02 | 154.22 | 13.94 | 146.09 | − 24.87 | 113.13 | − 46.57 | 154.85 | − 81.56 | 125.96 |
Vus – Vpre (ml) | 77.25 | 86.76 | 61.29 | 106.78 | 75.77 | 81.26 | 84.24 | 81.87 | 75.37 | 59.81 | 98.62 | 87.79 | 98.15 | 69.24 |
Vplan – Vus (ml) | 19.63 | 148.89 | 36.69 | 160.11 | 16.74 | 145.36 | − 8.91 | 158.96 | 24.52 | 98.93 | 13.65 | 178.22 | 42.56 | 126.19 |
Vpre – Vus (ml) | 9.11 | 116.47 | 34.05 | 140.01 | 24.76 | 105.70 | 5.02 | 123.70 | − 0.34 | 88.27 | − 32.92 | 93.74 | − 39.00 | 77.48 |
Vpost – Vpre (ml) | 86.37 | 70.63 | 95.34 | 83.17 | 100.54 | 65.21 | 89.27 | 81.27 | 75.02 | 58.02 | 65.70 | 39.35 | 59.15 | 50.60 |
(Vpost − Vpre)/dt | 3.43 | 3.05 | 3.68 | 3.33 | 4.26 | 4.03 | 2.34 | 1.76 | 2.93 | 2.16 | 2.90 | 1.92 | 2.33 | 2.30 |