From: Cochlea sparing optimized radiotherapy for nasopharyngeal carcinoma
 | T-stage | p value | |
---|---|---|---|
T1 or T2 (n = 12) | T3 or T4 (n = 8) | ||
Left cochlea Dmean | Â | Â | Â |
 Mean ± SD | 15.4 ± 7.1 | 24.2 ± 18.1 | 0.10 |
 Median [range] | 14.0 [7.3–33.1] | 18.2 [12.1–67.5] |  |
Left cochlea Dmax | Â | Â | Â |
 Mean ± SD | 25.8 ± 12.2 | 34.0 ± 18.6 | 0.34 |
 Median [range] | 23.3 [10.9–54.5] | 28.6 [17.5–69.8] |  |
Right cochlea Dmean | Â | Â | Â |
 Mean ± SD | 16.3 ± 4.6 | 30.3 ± 16.2 | 0.03 |
 Median [range] | 16.0 [8.4–23.8] | 25.5 [14.0–60.1] |  |
Right cochlea Dmax | Â | Â | Â |
 Mean ± SD | 28.9 ± 9.7 | 45.4 ± 20.6 | 0.13 |
 Median [range] | 28.7 [12.3–42.2] | 50.0 [15.8–69.1] |  |
 | N-stage |  | p value |
---|---|---|---|
N0 or N1 (n = 13) | N2 or N3 (n = 7) | ||
Left cochlea Dmean | Â | Â | Â |
 Mean ± SD | 21.1 ± 15.4 | 15.0 ± 5.8 | 0.35 |
 Median [range] | 17.2 [7.3–67.5] | 13.5 [8.1–26.2] |  |
Left cochlea Dmax | Â | Â | Â |
 Mean ± SD | 31.1 ± 16.0 | 25.4 ± 14.0 | 0.39 |
 Median [range] | 29.9 [12.9–69.8] | 23.0 [10.9–54.5] |  |
Right cochlea Dmean | Â | Â | Â |
 Mean ± SD | 23.4 ± 14.1 | 19.2 ± 9.6 | 0.49 |
 Median [range] | 17.1 [12.5–60.1] | 20.7 [8.4–37.3] |  |
Right cochlea Dmax | Â | Â | Â |
 Mean ± SD | 36.1 ± 16.1 | 34.5 ± 19.2 | 0.88 |
 Median [range] | 31.5 [15.8–64.9] | 35.8 [12.3–69.1] |  |
 | UICC8th | p value | |
---|---|---|---|
UICC I or UICC II (n = 8) | UICC III or UICC IV (n = 12) | ||
Left cochlea Dmean | Â | Â | Â |
 Mean ± SD | 17.2 ± 8.0 | 20.1 ± 15.8 | 0.97 |
 Median [range] | 16.3 [7.3–33.1] | 14.4 [8.1–67.5] |  |
Left cochlea Dmax | Â | Â | Â |
 Mean ± SD | 29.3 ± 13.2 | 29.0 ± 17.0 | 0.73 |
 Median [range] | 26.8 [12.9–54.5] | 24.3 [10.9–69.8] |  |
Right cochlea Dmean | Â | Â | Â |
 Mean ± SD | 17.7 ± 3.9 | 24.7 ± 15.6 | 0.73 |
 Median [range] | 16.6 [12.5–23.8] | 21.1 [8.4–60.1] |  |
Right cochlea Dmax | Â | Â | Â |
 Mean ± SD | 31.5 ± 7.5 | 38.2 ± 20.7 | 0.79 |
 Median [range] | 31.4 [19.9–42.2] | 38.7 [12.3–69.1] |  |