Table 4.
Comparison of the small bowel dose-volume and NTCP between prone and supine patients
| Variable | Supine position | Prone position | T | p |
|---|---|---|---|---|
| V5 (cc) | 361.0 ± 113.2 | 208.0 ± 62.0 | 3.73 | 0.003 |
| V10 (cc) | 262.4 ± 78.5 | 191.4 ± 58.2 | 3.64 | 0.003 |
| V15 (cc) | 176.6 ± 47.2 | 160.0 ± 51.1 | 1.84 | 0.092 |
| V20 (cc) | 139.2 ± 44.7 | 134.7 ± 49.6 | 0.24 | 0.811 |
| V25 (cc) | 112.8 ± 41.9 | 110.3 ± 45.0 | −0.28 | 0.777 |
| V30 (cc) | 86.8 ± 38.6 | 76.6 ± 37.9 | −0.28 | 0.779 |
| V35 (cc) | 67.5 ± 34.1 | 60.3 ± 32.4 | −0.02 | 0.980 |
| V40 (cc) | 52.4 ± 29.2 | 47.5 ± 28.9 | 0.06 | 0.953 |
| V45 (cc) | 38.8 ± 24.7 | 36.6 ± 24.4 | 0.18 | 0.856 |
| V50 (cc) | 21.3 ± 20.4 | 23.0 ± 16.8 | 0.24 | 0.813 |
| Dmax (cGy) | 5341 ± 28 | 5341 ± 29 | 0.01 | 0.989 |
| NTCPC (%) | 4.9 ± 2.9 | 2.3 ± 1.6 | 2.14 | 0.055 |
| NTCPA (%) | 58.3 ± 7.1 | 55.7 ± 9.8 | 1.74 | 0.109 |