Table 2.

Comparison of mean difference of salivary flow rates at each appointment (1^st, 2^nd, 3^rd and 4^th) between xerostomia and healthy patients from base value of mean salivary flow rate before TENS on the first appointment to mean salivary flow rate after TENS at each appointment

Groups	Mean difference salivary flow rate of 1ST appointment (mL/min)	Mean difference salivary flow rate of 2nd appointment (mL/min)	Mean difference salivary flow rate of 3rd appointment (mL/min)	Mean difference salivary flow rate of 4th appointment (mL/min)
Xerostomia (Experimental)	0.12±0.11	0.41±0.24	0.73±0.26	1.14±0.30
Healthy (Control)	0.30±0.14	0.74±0.24	1.12±0.25	1.56±0.28
P	<0.001	<0.001	<0.001	<0.001

HS=Highly Significant. By using Unpaired Student’s ‘t’ test