Smokers (n=54) Snuffers (n=60) p Smokers (n=54) Chewers (n=60) p Snuffers (n=60) Chewers (n=60) p Serum α -amylase (m ± Et) 110.53 ± 73.35 109.69 ± 58.20 0.94 110.53 ± 73.35 92.63 ± 48.84 0.23 109.69 ± 58.20 92.63 ± 48.84 0.08 Salivary α -amylase (m ± Et) 17.34 ± 17 9.90 ± 9.44 0.059 17.34 ± 17 5.61 ± 5.38 <0.001 9.90 ± 9.44 5.61 ± 5.38 0.002 m ± Et: average ± standard deviation

Table 3: Comparison of serum (UI/L) and salivary (104 UI/L) alpha-amylase activity between tobacco consumers groups.