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Table 3 Statistical correlation of disease characteristics with survival outcomes

From: Intraoperative radiation therapy for advanced cervical metastasis: a single institution experience

Characteristic (%) Median OS (y) p Median RFS (y) p
IORT dose   0.863   0.029
≤ 1500 cGy (39.1%) 1.2   1.5  
> 1500 cGy (60.9%) 1.5   NE  
Energy   0.064   0.006
4 MeV (29%) 1.0   NE  
5 MeV (51%) 1.6   NE  
6+ MeV (20%) 1.0   0.8  
ECE   0.569   0.310
Yes (12%) 1.4   0.9  
No (88%) 1.7   3.9  
LVI/AVI   0.071   0.064
Yes (16%) 0.8   0.7  
No (84%) 1.7   3.9  
PNI   < 0.001   0.387
Yes (17%) 0.6   1.1  
No (83%) 1.9   3.9  
Dermal Invasion   0.035   0.911
Yes (21%) 0.9   NE  
No (79%) 1.9   3.1  
Carotid Involvement   0.010   0.199
Yes (33%) 1.0   1.1  
No (67%) 2.2   NE  
Vasc. Complications   0.823   0.894
Yes (11%) 1.2   1.1  
No (89%) 1.2   1.5  
Prior RT   0.263   0.246
Yes (81%) 1.4   3.2  
No (19%) 2.2   NE  
Previous Chemo   0.419   0.045
Yes (51%) 1.6   1.2  
No (49%) 0.9   10.4  
Post Surgery RT   0.457   0.127
No (76%) 1.5   10.4  
Yes (24%) 1.6   1.2  
  1. Survival times estimated using Kaplan-Meier method and tested between groups using the long-rank test.
  2. NE - not estimable