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Table 1 Comparison of demographic and pathologic variables between the submandibular gland (SMG) preservation and SMG excision groups

From: Impact of submandibular gland preservation in neck management of early-stage buccal squamous cell carcinoma on locoregional control and disease-specific survival

Variables SMG preservation SMG excision p
  N = 31 N = 106  
Age 55.4 (38–65) 60.5 (35–78) 0.034
Sex
 Male 20 (64.5%) 83 (78.3%)  
 Female 11 (35.5%) 23 (21.7%) 0.118
Smoker
 Yes 19 (61.3%) 79 (74.5%)  
 No 12 (38.7%) 27 (25.5%) 0.151
Drinker
 Yes 15 (48.4%) 57 (53.8%)  
 No 16 (51.6%) 49 (46.2%) 0.597
Clinical tumor stage
 T1 17 (54.8%) 45 (42.5%)  
 T2 14 (45.2%) 61 (57.5%) 0.223
Pathologic tumor stage
 T1 15 (48.4%) 40 (37.7%)  
 T2 16 (51.6%) 66 (62.3%) 0.287
Perineural invasion
 Positive 4 (12.9%) 10 (9.4%)  
 Negative 27 (87.1%) 96 (90.6%) 0.736
Lymphovascular invasion
 Positive 3 (9.7%) 10 (9.4%)  
 Negative 28 (90.3%) 96 (90.6%) 1.000
Tumor differentiation
 Well 10 (32.3%) 30 (28.3%)  
 Moderate 14 (45.2%) 64 (60.4%)  
 Poor 7 (22.6%) 12 (11.3%) 0.199
Cervical lymph node stage
 N0 25 (80.6%) 88 (83.0%)  
 N+ 6 (19.4%) 18 (17.0%) 0.760
Transient MMN injury* 2 (6.5%) 10 (9.4%) 0.734
Postoperative radiotherapy 4 (12.9%) 23 (21.7%) 0.319
  1. *MMN Marginal mandibular nerve