Table 2.

General clinical indicators in the two groups.

Group	N	Sex		Average age (years)	Dementia course (months)	Grading of dysphagia
		Male	Female			II	III	IV	V
Observation	108	66	42	69.88 ± 6.17	8.39 ± 1.29	18	42	30	18
Control	106	60	46	70.25 ± 5.62	8.53 ± 1.33	20	40	32	16
χ2/t		0.224		0.324	0.553	0.168
P		0.636		0.747	0.582	0.983

Values in the table are mean ± standard deviation or n, unless otherwise noted.