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Table 3 Association between patient characteristics and nodal extracapsular extension (ECE) (n = 29)

From: Pretreatment predictors of adjuvant chemoradiation in patients receiving transoral robotic surgery for squamous cell carcinoma of the oropharynx: a case control study

Characteristic ECE No ECE P Value
Age (Mean) 55.5 58.4 .35
Sex
 Male 12 (55 %) 10 (46 %) .68
 Female 3 (43 %) 4 (57 %)  
Location
 Tonsil 8 (62 %) 5 (39 %) .48
 Base of Tongue 7 (47 %) 8 (53 %)  
Smoking
 Smoker 9 (53 %) 8 (47 %) > .99
 Non-Smoker 6 (50 %) 6 (50 %)  
p16
 Positive 14 (61 %) 9 (39 %) .56
 Negative 1 (33 %) 2 (67 %)  
Preoperative Tumor Size (Mean) 2.18 cm 2.13 cm .86
Preoperative Tumor Size
Median = 2.20 cm    > .99
 Less than median size 6 (55 %) 5 (46 %)  
 Greater than or equal to median size 4 (50 %) 4 (50 %)  
Postoperative Tumor Size (Mean) 1.90 cm 2.26 cm .33
Postoperative Tumor Size
Median = 2.20 cm    > .99
 Less than median size 8 (53 %) 7 (47 %)  
 Greater than or equal to median size 6 (50 %) 6 (50 %)  
Preoperative Node Size (Mean) 3.23 cm 1.88 cm .002
Preoperative Node Size
Median = 3.00 cm    .046
 Less than median size 4 (44 %) 5 (56 %)  
 Greater than or equal to median size 11 (92 %) 1 (8 %)  
Postoperative Node Size (Mean) 3.83 cm 2.38 cm .03
Postoperative Node Size
Median = 3.50 cm    .02
 Less than median size 4 (50 %) 4 (50 %)  
 Greater than or equal to median size 11 (100 %) 0 (0 %)  
Number of Positive Nodes on Imaging
 1 10 (71 %) 4 (29 %) > .99
 2 or more 5 (71 %) 2 (29 %)  
Number of Positive Nodes on Dissection
 1 5 (71 %) 2 (29 %) .60
 2 or more 10 (83 %) 2 (17 %)  
ECE on Imaging
 Positive 8 (89 %) 1 (11 %) .01
 Negative 7 (35 %) 13 (65 %)  
Node Necrosis on Imaging
 Positive 12 (86 %) 2 (14 %) .001
 Negative 3 (20 %) 12 (80 %)  
  1. ECE indicates extracapsular extension