Fig. 6

Describes the population distribution based on the type of habit. Majority of the population were betel quid chewers with tobacco (73.4%). Thus the synergistic effect by combining tobacco with betel quid, alcohol and smoking was also considered to assess their association in developing OSF and their correlation with polymorphism. Association of type of habit with polymorphism. No significant difference was noted with the type of habit and 5A/5A, 5A/6A(polymorphism)