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 0.5977 x+71.359 1213.1 x+10672 0.7083 x+98.532 -940.95 x+189377 -0.3097 x+114.1 -1553.6 x+121098 r2 0.039 0.1219 0.0082 0.0027 0.003 0.0284 P (of inclination) 0.13 0.006 0.51 0.71 0.67 0.19 Interpretation Poor correlation Degree of significance NS NS NS NS NS NS Legend: Y=Activity of serum and salivary alpha-amylase; x=Duration of tobacco consumption (in year); r2=Correlation coefficient; NS=Insignificant; S=Significant

Table 5: Correlation between serum and salivary alpha-amylase activity and duration of tobacco consumption (in year).