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Table 2 Surgical and cancer characteristics

From: Decreasing loco-regional recurrence for oral cavity cancer with total Mohs margins technique

Characteristics Conventional Mohs p-values
Cancer Stage (%) 0.216a
 0 5.3 3.3  
 I 19.3 25.0  
 II 15.8 26.7  
 III 31.6 15.0  
 IV 28.1 30.0  
Infiltrative (%) 75.4 84.6 0.2332b
Number of margins taken after primary resection (%) <0.0001a
 0 margin 87.7 31.7  
 1 margin 8.8 60.0  
 2 margins 3.5 5.0  
 3 margins 0 3.3  
Location of positive margins (%) 0.0861b
 Floor of mouth 42.9 24.3  
 Tongue base 28.65 5.4  
 Deep margin 14.3 48.6  
 Other 14.3 21.6  
Margins > 2 mm (%) 83.6 91.7 0.1883b
Closest margins dimension (mm) 3.949
(3.378; 4.520) 95% CI
2.785
(2.311; 3.258) 95% CI
0.0003b
Mild dysplasia close to margin (%) 31.6 15.4 0.0475b
Perineural or perivascular invasion (%) 21.1 29.6 0.2984b
Positive nodes dissection (%) 40.0 43.2 0.7547b
Zones for positive nodes (%)    0.8860a
 I 20.0 15.4  
 II 33.3 46.2  
 III and further 46.7 38.5  
Capsular spreading (%) 15.8 (3/19) 35.3 (6/17) 0.2553a
Radiation therapy (%) 54.4 35.6 0.04191b
Radiation +/− Chemotherapy (%) 57.9 47.5 0.2604b
Time for cancer recurrence (median, days, IQR) 390.2
(234.8; 545.5)
182.5
(80.7; 284.3)
0.0832b
Follow-up time (median, days IQR) 2162
(1200, 2812)
1093
(532,4; 1444)
0.0100b
Cancer recurrence according to initial stages (% of recurrence)
 I 31.25 25 0.0913a
 II 0 12.5  
 III 67.50 25  
 IV 31.25 37.5  
  1. aFicher exact test
  2. bChi-square test