Table 2.

Comparison of preprandial salivary glucose by serum glucose (patients)

Serum glucose range	Mean of salivary glucose	SD	f-value
Below 130 mg/dL	2.18 mg/dL	1.29	42.13**
130–200 mg/dL	4.05 mg/dL	2.56	(P < 0.01)
Above 200 mg/dL	8.74 mg/dL	4.50

Note:

^**f-value shows statistically significant difference between serum glucose and salivary glucose.

Abbreviation: SD, standard deviation.