Table 5.
Volume of shoulder organ-at-risk (OAR) receiving moderate to high-dose radiation by type of radiation therapy in patients with quick disabilities of the arm, shoulder, and hand (DASH) scores.
| Dose parameter | IMRT (n = 24) | 3DCRT (n = 58) | p-value |
|---|---|---|---|
| V50Gy (SD), cc V50Gy (SD), % |
8.8 (10.6) 1.0% (1.0) |
35.7 (45.5) 4.0% (4.9) |
0.0056 <0.0001 |
| V47.5Gy (SD), cc V47.5Gy (SD), % |
16.7 (17.3) 1.9% (1.5) |
140.5 (93.5) 15.5% (9.3) |
<0.0001 <0.0001 |
| V40Gy (SD), cc V40Gy (SD), % |
41.9 (36.4) 4.7% (3.2) |
282.7 (82.9) 32.0% (7.0) |
<0.0001 <0.0001 |
| V30Gy (SD), cc V30Gy (SD), % |
104.0 (66.0) 11.9% (6.0) |
325.9 (90.0) 37.0% (7.5) |
<0.0001 <0.0001 |
| V20Gy (SD), cc V20Gy (SD), % |
223.9 (96.9) 25.6% (7.9) |
377.5 (103.0) 42.8% (8.3) |
<0.0001 <0.0001 |
| V10Gy (SD), cc V10Gy (SD), % |
458.0 (150.6) 52.7% (8.7) |
414.6 (111.3) 47.1% (8.9) |
0.1531 0.0099 |
| V5Gy (SD), cc V5Gy (SD), % |
578.3 (135.3) 67.7 (6.3) |
460.6 (121.7) 52.2 (9.6) |
0.0002 <0.0001 |
Vx, volume of muscle receiving x Gy or higher; IMRT, intensity-modulated radiation therapy; 3DCRT, 3D conformal radiation therapy; SD, standard deviation.