Table 10.

MMSE and severity of dementia

	Mean	N	Std. deviation
No dementia	22.06	43	0.35
Mild dementia	21.10	42	1.57
Moderate dementia	16.00	39	3.87
Severe dementia	5.60	5	4.93
Total within dementia group	17.88	86	3.02
Total number		129

P>0.001