Pearson correlation test Parameter Sample set 1 Sample set 2
Blood glucose (mmol/l) Blood glucose (mmol/l)
Fasting Post meal Random Fasting Post meal Random
Subjects
with uncontrolled diabetes		 Salivary glucose
(mmol/l)
r (P values)		 0.32 (0.04a) - 0.01 (0.94b) - 0.36 (0.009a) 0.02 (0.863b) -
Subjects
with controlled diabetes		 - 0.25 (0.11b) 0.13 (0.41b) - - 0.26 (0.065b) - 0.13 (0.337b) -
Healthy non-diabetics - - 0.16 (0.51b) - - - 0.06 (0.967b)

aStatistically significant at the level P ≤ 0.05.
bNo statistically significant at the level P >0.05 (Pearson correlation test).
r = Correlation coefficient; mmol/l = millimoles per litre.