Hyperkeratosis and Squamous cell carcinoma
(n=10, each)
Mild dysplasias  and squamous cell carcinoma
(n=10, each)
Moderate dysplasia and squamous cell carcinoma
(n=10, each)
Severe dysplasia and squamous cell carcinoma
(n=10, each)
T 0.76 0.67 0.14 0.15
P value 0.240 0.113 0.672 0.23
Table 8: Proliferation indices using Ki67 immunostaining.