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Table 1 Associations of adjuvant radiotherapy with clinicopathological characteristics—first group

From: The role of postoperative radiotherapy in pN1 oral cavity cancer without extranodal extension

  Adjuvant radiotherapy
(−) (+) p values
Characteristics n = 26 n = 76  
Age (years)a 56.8 ± 10.9 (79.7, 41.0) 53.5 ± 9.0 (84.1, 36.2) 0.25
Sex
 Male 22 69 0.38
 Female 4 7  
Lesion site
 Buccal mucosa 13 32 0.63
 Mouth floor 3 4  
 Gum 4 12  
 Hard palate 0 2  
 Lip 0 3  
 Tongue 6 23  
pT Status
 1 3 6 < 0.001*
 2 18 18  
 3 2 18  
 4 3 34  
Overall pathological stage
 III 24 40 < 0.001*
 IV 2 36  
Cell differentiationb
 W-D+M-D 24 61 0.15
 P-D 2 15  
Tumor depth (mm)a 7.9 ± 6.9 (30.0, 1.0) 14.1 ± 8.3 (34.0, 2.0) < 0.001*
Neck recurrence
 (−) 24 64 0.30
 (+) 2 12  
Distant metastasis
 (−) 25 71 0.61
 (+) 1 5  
  1. * Statistically significant
  2. aMean ± SD (maximum, minimum)
  3. bW-D well-differentiated, M-D moderately differentiated, P-D poorly differentiated squamous cell carcinoma