Table 4 Ipsilateral shoulder/arm toxicity according to pre-radiotherapy scapula alata status (SA pre-RT)
| Â | All | SA pre-RT absent | SA pre-RT present | 2P | ||
|---|---|---|---|---|---|---|
| Â | n | n | (col%) | n | (col%) | Â |
Volume | Â | Â | Â | Â | Â | 0.013 |
 Grade 0 | 92 | 85 | (80.2) | 7 | (53.8) |  |
 Grade 1 | 14 | 12 | (11.3) | 2 | (15.4) |  |
 Grade 2 | 13 | 9 | (8.5) | 4 | (30.8) |  |
 Grade 3 | 0 | 0 | (0) | 0 | (0) |  |
Abduction | Â | Â | Â | Â | Â | 0.228 |
 Grade 0 | 69 | 63 | (59.4) | 6 | (46.2) |  |
 Grade 1 | 35 | 31 | (29.2) | 4 | (30.8) |  |
 Grade 2 | 15 | 12 | (11.3) | 3 | (23.1) |  |
 Grade 3 | 0 | 0 | (0) | 0 | (0) |  |
Retroflexion | Â | Â | Â | Â | Â | 0.312 |
 Grade 0 | 58 | 52 | (49.1) | 6 | (46.2) |  |
 Grade 1 | 52 | 48 | (45.3) | 4 | (30.8) |  |
 Grade 2 | 8 | 5 | (4.7) | 3 | (23.1) |  |
 Grade 3 | 1 | 1 | (0.9) | 0 | (0) |  |
Anteflexion | Â | Â | Â | Â | Â | 0.463 |
 Grade 0 | 91 | 80 | (75.5) | 11 | (84.6) |  |
 Grade 1 | 28 | 26 | (24.5) | 2 | (15.4) |  |
 Grade 2 | 0 | 0 | (0) | 0 | (0) |  |
 Grade 3 | 0 | 0 | (0) | 0 | (0) |  |
Endorotation | Â | Â | Â | Â | Â | 0.668 |
 Grade 0 | 79 | 69 | (65.1) | 10 | (76.9) |  |
 Grade 1 | 28 | 26 | (24.5) | 2 | (15.4) |  |
 Grade 2 | 8 | 8 | (7.5) | 0 | (0) |  |
 Grade 3 | 4 | 3 | (2.8) | 1 | (7.7) |  |
Scapular distance | Â | Â | Â | Â | Â | 0.001 |
 Grade 0 | 73 | 68 | (64.2) | 5 | (38.5) |  |
 Grade 1 | 36 | 32 | (30.2) | 4 | (30.8) |  |
 Grade 2 | 5 | 4 | (3.8) | 1 | (7.7) |  |
 Grade 3 | 5 | 2 | (1.9) | 3 | (23.1) |  |