Table 3.
The effect of oral dose volume parameters on severe ROM indicated by univariate analysis (x̅±s)
| Parameters | ROM | Severe ROM | t value | P value |
|---|---|---|---|---|
| V20 (%) | 92.46 ± 8.50 | 94.25 ± 6.64 | 1.415 | 0.159 |
| V25 (%) | 73.96 ± 16.47 | 78.66 ± 16.14 | 1.802 | 0.073 |
| V30 (%) | 55.57 ± 18.12 | 62.78 ± 18.20 | 2.497 | 0.013 |
| V35 (%) | 39.95 ± 15.35 | 48.44 ± 16.99 | 3.348 | 0.001 |
| V40 (%) | 29.08 ± 12.75 | 37.01 ± 15.90 | 3.344 | 0.001 |
| V45 (%) | 21.34 ± 11.09 | 28.52 ± 14.90 | 3.289 | 0.001 |
| V50 (%) | 15.17 ± 9.65 | 21.70 ± 13.68 | 3.291 | 0.001 |
| Dmean (cGy) | 3469.62 ± 461.09 | 3778.60 ± 573.59 | 3.863 | 0.000 |
| Dmax (cGy) | 6872.31 ± 575.39 | 7033.46 ± 564.62 | 1.770 | 0.079 |
Dmean: mean dose to the oral cavity; Dmax: maximum dose to the oral cavity.