Table 5.
Comparisons of doses to the organs at risk between the control and test plans in different patient groups
| Dose parameters | Group 1 (n = 15) |
Group 2 (n = 15) |
Group 3 (n = 20) |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Control plan (mean ± SD) | Test plan (mean ± SD) | p-value | Control plan (mean ± SD) | Test plan (mean ± SD) | p-value | Control plan (mean ± SD) | Test plan (mean ± SD) | p-value | |
| Contra parotid gland Dmean (Gy) |
36.65 ± 2.32 |
35.85 ± 2.07 |
0.040 |
38.18 ± 3.00 |
36.49 ± 2.70 |
0.010 |
39.15 ± 2.07 |
37.70 ± 2.31 |
0.010 |
| Brain stem D1 (Gy) |
45.10 ± 3.02 |
45.06 ± 3.04 |
0.765 |
47.16 ± 3.91 |
47.07 ± 4.00 |
0.458 |
48.66 ± 5.13 |
48.35 ± 5.49 |
0.344 |
| Spinal cord D1 (Gy) |
39.21 ± 1.46 |
39.27 ± 1.45 |
0.865 |
38.77 ± 1.48 |
38.94 ± 1.50 |
0.190 |
39.98 ± 1.87 |
40.22 ± 1.84 |
0.141 |
| Ipsi TM joint Dmean (Gy) |
33.35 ± 4.45 |
33.46 ± 4.25 |
0.663 |
35.27 ± 6.22 |
34.60 ± 6.20 |
0.090 |
38.06 ± 9.67 |
37.92 ± 9.91 |
0.550 |
| Oral cavity Dmean (Gy) |
35.91 ± 2.07 |
35.89 ± 3.21 |
0.012 |
37.24 ± 2.62 |
37.83 ± 2.65 |
0.001 |
36.50 ± 2.98 |
37.24 ± 3.28 |
0.001 |
| Larynx Dmean (Gy) |
38.60 ± 2.36 |
38.75 ± 2.25 |
0.271 |
37.77 ± 3.30 |
37.56 ± 3.29 |
0.075 |
38.76 ± 2.02 |
38.59 ± 2.28 |
0.341 |
| Thyroid Dmean (Gy) | 42.09 ± 7.83 | 42.13 ± 7.89 | 0.754 | 38.73 ± 10.18 | 38.82 ± 10.17 | 0.201 | 45.43 ± 4.76 | 45.48 ± 4.82 | 0.615 |
Contra, contralateral; D1, dose received by 1% volume of the organ; Dmean, mean dose; ipsi, ipsilateral; SD, standard deviation; TM, temporomandibular.