Chewers (n=60) Smokers (n=54) Snuffers (n=60)   Serum α-amylase Salivary α-Amylase Serum α-amylase Salivary α-Amylase Serum α-amylase Salivary α-Amylase Equation Y 1.39 x+83.83   0.04 x+5.08 -0.14 x+111.78 0.012 x+17.23   0.58 x+107.02 -0.26 x+11.08 r2 0.01 0.0009 0.0002 0.00003 0.002 0.015 P (of inclination) 0.40 0.77 0.92 0.94 0.74 0.26 Interpretation Correlation : poor or nil Degree of significance NS NS NS NS NS NS Legend: Y=Activity of serum and salivary alpha-amylase; x=Quantity of daily tobacco consumption (in gram); r2=Correlation coefficient; NS=Insignificant

Table 6: Correlation between serum and salivary alpha-amylase activity and quantity of daily tobacco consumption (in gram).