Table 2.
Factors analysis with parotid gland function
| Factors* | Spearman’s correlation | β-value | 95% confidence interval | Univariate analysis (p-value) | Multivariate analysis (p-value) |
|---|---|---|---|---|---|
| Parotid mean dose |
−0.807 |
−0.759 |
−0.25-−0.15 |
< 0.001 |
< 0.001 |
| Age (≥ 50 vs. <50) |
0.146 |
0.141 |
−3.28-24.92 |
0.26 |
0.13 |
| Tumor site (oral cavity vs. non-oral cavity) |
−0.116 |
−0.101 |
−40.55-25.12 |
0.37 |
0.64 |
| Surgery (yes vs. no) |
−0.052 |
−0.092 |
−40.27-26.17 |
0.69 |
0.67 |
| Chemotherapy (yes vs. no) | 0.017 | 0.166 | −1.37-27.24 | 0.90 | 0.08 |
*Factors associated with recovery of parotid gland function at 1 year after radiotherapy.