Univariate analysis Univariate analysis Univariate analysis
Variables Categories HR 95%CI p-value
Sex Male 0.316 0.107-0.935 0.037
Female
Age (years) ≤50 1.828 0.648-5.157 0.255
>50
Pathology Non-keratinizing 0.840 0.502-1.405 0.507
Squamous
Previous EBRT times 1 0.115 0.032-0.415 0.001
2-3
Time from EBRT to RSI-BT (months) ≤18 1.733 0.573-5.243 0.330
>18
KPS ≥80 0.261 0.076-0.900 0.033
<80
Implantation Sites In situ 2.517 0.782-8.108 0.122
Lymph nodes
D90 (Gy) <120 1.126 0.383-3.314 0.829
≥120
RSI-BT assistance Without 3D-PT 6.242 0.814-47.867 0.078
3D-PT
Short-term efficacy CR+PR 0.785 0.167-3.683 0.759
SD+PD