Table 6.
Comparison of dosimetric variables in three techniques of DP, IMRT, and 3DCRT
| Structure | Dosimetric variable | DP | IMRT | 3DCRT | 95% CI of difference | ||
|---|---|---|---|---|---|---|---|
| Mean ± SD | Mean ± SD | Mean ± SD | DP versus IMRT | DP versus 3DCRT | IMRT versus 3DCRT | ||
| Bladder | V80 (%) | 3.83 ± 2.9 | 3.34 ± 2.02 | 14.16 ± 8.33 | − 3.555 to 4.551 | − 14.38 to − 6.273* | − 14.88 to − 6.771* |
| V75 (%) | 14.02 ± 3.13 | 13.87 ± 6.67 | 22.31 ± 9.24 | − 3.109 to 5.678 | − 11.44 to − 2.654* | − 12.73 to − 3.939* | |
| V70 (%) | 19.2 ± 5.1 | 18.59 ± 8.88 | 26.91 ± 11.48 | − 5.492 to 7.861 | − 13.72 to − 0.3676* | − 14.90 to − 1.552* | |
| V65 (%) | 22.99 ± 9.9 | 21.85 ± 11.19 | 29.57 ± 13.37 | − 8.702 to 7.900 | − 15.33 to 1.272 | − 14.93 to 1.673 | |
| Mean dose (Gy) | 37.5 ± 5.66 | 35.15 ± 10.14 | 44.9 ± 9.23 | − 2.762 to 10.07 | − 13.64 to − 0.8027* | − 17.29 to − 4.458* | |
| Rectum | V75 (%) | 11.6 ± 2.2 | 12.85 ± 2.13 | 34.85 ± 3.41 | − 3.389 to 0.7814 | − 25.43 to − 21.26* | − 24.13 to − 19.96* |
| V70 (%) | 17.05 ± 2.65 | 17.23 ± 4.91 | 42.12 ± 4.63 | − 5.255 to 1.508 | − 29.44 to − 22.68* | − 27.56 to − 20.80* | |
| V65 (%) | 19.22 ± 2.52 | 20.08 ± 2.36 | 48.11 ± 6.77 | − 4.247 to 2.121 | − 33.17 to − 26.80* | − 32.11 to − 25.74* | |
| V60 (%) | 25.28 ± 3.38 | 25.43 ± 3.59 | 57.21 ± 6 | − 3.609 to 3.329 | − 35.40 to − 28.46* | − 35.26 to − 28.32* | |
| V50 (%) | 32.27 ± 4.5 | 35.64 ± 3.78 | 70.12 ± 6 | − 8.324 to 0.2627 | − 42.18 to − 33.59* | − 38.27 to − 29.43* | |
| Mean dose (Gy) | 39.7 ± 3.12 | 41.45 ± 2.12 | 57.25 ± 3.98 | − 4.659 to 0.5579 | − 20.52 to − 15.31* | − 18.55 to − 13.18* | |
| Right femur head | V40 (%) | 8.64 ± 3.98 | 12.89 ± 6 | 44.75 ± 10.96 | − 9.475 to 1.131 | − 41.21 to − 30.60* | − 37.03 to − 26.43* |
| V50 (%) | 0.63 ± 0.73 | 1.1 ± 0.82 | 21.8 ± 4.54 | − 3.053 to 0.8153 | − 22.95 to − 19.08* | − 21.83 to − 17.96* | |
| Mean dose (Gy) | 28.42 ± 2.57 | 29.03 ± 3.21 | 39.86 ± 4.85 | − 1.678 to 3.192 | − 13.54 to − 8.668* | − 14.30 to − 9.425* | |
| Left femur head | V40 (%) | 9.05 ± 3.09 | 12.46 ± 6.47 | 45.55 ± 11 | − 8.272 to 2.000 | − 40.02 to -29.74* | − 36.88 to − 26.61* |
| V50 (%) | 0.75 ± 0.9 | 1.89 ± 1.36 | 22.98 ± 3.77 | − 2.778 to 1.509 | − 23.76 to -19.47* | − 23.12 to − 18.84* | |
| Mean dose (Gy) | 29.01 ± 1.31 | 29.79 ± 2.02 | 40.17 ± 4.6 | − 1.760 to 3.422 | − 13.10 to − 7.920* | − 13.93 to − 8.751* | |
*Significant difference