Table 2.

Assessment of dryness of the oral cavity in AD patients and healthy controls.

	Assessment n (%)	AD	C	p
Vermilion zone hydration	0	0	3 (12%)	< 0.0001
	1	1 (4%)	18 (72%)
	2	2 (8%)	2 (8%)
	3	22 (88%)	2 (8%)
Buccal mucosa hydration	1	0	15 (60%)	< 0.0001
	2	0	10 (40%)
	3	25 (100%)	0
Condition of tongue mucosa	1	0	23 (92%)	< 0.0001
	2	25 (100%)	2 (8%)
Palpation of salivary glands	1	1 (4%)	25 (100%)	< 0.0001
	2	24 (96%)	0

AD—Alzheimer’s disease; C—control group.