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Table 1 Characteristics of NPC undergoing MRND and RND/ERND

From: Salvage surgery for neck residue or recurrence of nasopharyngeal carcinoma after primary radiotherapy: options of surgical methods and regions

Characteristic Cases observed Surgical procedure χ 2 value P
   MRND (89) RND/ERND (64)   
Age (year)      
 ≤50 90 55 35   
 >50 63 34 29 0.777 0.378
Gender      
 Male 128 74 54   
 Female 25 15 10 0.041 0.839
Status of LN      
 Recurrence 105 54 51   
 Residue 48 35 13 6.251 0.012
rN stage      
 N1 109 79 30   
 N2 17 8 9   
 N3 27 2 25 38.625 0.000
Size of LN      
 ≤3 cm 80 68 12   
 3~6 cm 47 20 27   
 >6 cm 26 1 25 59.911 0.000
ECS      
 Yes 111 47 64   
 No 42 42 0 41.630 0.000