Table 1

Clinicopathological features of patients

All cases (%)Cases with SOM (%)Non-SOM (%)Pa
Total68 (100)36 (100)32 (100)
Mean age (yr)+ SD58.3 ± 14.758.4 ± 15.958.1 ± 13.60.93
Male sex—no. (%)35 (51)17 (47)18 (56)0.48
Tobacco use ever—no. (%)43 (69)b22 (63)21 (78)0.27
Stage
CIS (stage 0)15 (22)7 (19)8 (25)0.77
 I and II33 (49)19 (53)14 (44)
 III and IV20 (29)10 (28)10 (31)
Histological grade (for 53 invasive SCC)
 Well or moderately well differentiated49 (92)27 (96)22 (88)0.33
 Poorly differentiated4 (8)1 (4)3 (12)
Mean follow-up time (months)± SD83 ± 8064 ± 62104 ± 930.04
  • a P was calculated comparing SOM versus non-SOM patients.

  • b Smoking information available for 35 SOM and 27 non-SOM cases.