Table 4.
Correlation of Radiation Dosimetric Parameters of Inner Ear with SNHL (102 Ears)
| Parameters | Cutoff | Incidence Above Cutoff | Incidence Under Cutoff | P | OR | 95% CI |
|---|---|---|---|---|---|---|
| V30 | 62.2% | 17.0% (8/47) | 9.1% (5/55) | .231 | 2.44 | 0.62-6.77 |
| V40 | 22.0% | 18.3% (11/60) | 4.8% (2/42) | .043 | 4.49 | 0.94-21.44 |
| V50 | 2.4% | 19.0% (11/58) | 4.5% (2/44) | .031 | 4.92 | 1.03-23.46 |
| V60 | 0.16% | 15.6% (5/32) | 11.4% (8/70) | .555 | 1.44 | 0.43-4.79 |
| V70 | 6.1% | 10.5% (2/19) | 13.3% (11/83) | 1.000⁎ | 0.77 | 0.16-3.80 |
| Mean dose | 35.0Gy | 17.0% (8/47) | 9.1% (5/55) | .231 | 2.05 | 0.62-6.77 |
| Dmin | 18.8Gy | 16.4% (9/55) | 8.5% (4/47) | .236 | 2.10 | 0.60-7.33 |
| Dmax | 56.8Gy | 19.6% (10/51) | 5.9% (3/51) | .038 | 3.90 | 1.01-15.14 |
| Median dose | 36.8Gy | 20.4% (11/54) | 4.2% (2/48) | .014 | 5.88 | 1.23-28.08 |
| EUD (a= 16.7) | 43.5Gy | 21.1% (12/57) | 2.2% (1/45) | .005 | 11.7 | 1.46-96.01 |
| D0.1 ml | 48.0Gy | 19.4% (12/62) | 2.5% (1/40) | .013 | 9.36 | 1.17-75.11 |
| D0.035 ml | 51.4Gy | 19.6% (11/56) | 4.3% (2/46) | .021 | 5.38 | 1.13-25.67 |
⁎
Fisher’s exact test was used.