Univariate analysis Univariate analysis Univariate analysis
Variables Categories HR 95%CI p-value p-value
Sex Male 0.730 0.285-1.871 0.512 0.512
Female
Age (years) ≤50 0.742 0.277-1.984 0.552 0.552
>50
Pathology Non-keratinizing 0.813 0.321-2.062 0.663 0.663
Squamous
Previous EBRT times 1 0.288 0.109-0.756 0.012 0.012
2-3
Time from EBRT to RSI-BT (months) ≤18 0.899 0.348-2.322 0.826 0.826
>18
KPS ≥80 0.367 0.122-1.108 0.075 0.075
<80
Implantation Sites In situ 0.993 0.389-2.533 0.988 0.988
Lymph nodes
D90 (Gy) <120 0.837 0.299-2.346 0.735 0.735
≥120
RSI-BT assistance Without 3D-PT 1.509 0.535-4.252 0.437 0.437
3D-PT
Short-term efficacy CR+PR 0.579 0.181-1.854 0.357 0.357
SD+PD