Table 3.

Descriptive statistics between age groups for socio-demographic variables.

	Total sample	Age groups
Age ranges	60–91	Young–old 60–69	Old–old 70–79	Oldest–old >80
N	95	24	47	24
Age	74.49 ± 7.29	65.54 ± 2.637	74.62 ± 2.75	83.88 ± 3.180
SEX
Men	29	5	16	8
Woman	66	19	31	16
EDUCATION
Years of formal education	5.71 ± 4.89	7.142 ± 5.174	5.78 ± 5.133	4.08 ± 3.538
Illiteracy	7	2	3	2
Primary school	65	14	34	20
Secondary or Higher	23	8	10	2
Pfeffer scale	3.400 ± 4.648	4.230 ± 4.206	2.760 ± 3.940	4.050 ± 6.013
MMSE	25.591 ± 3.083	27 ± 2.221	25.588 ± 2.664	25.000 ± 3.293

Values are frequencies or Mean ± Standard Deviation (SD); MMSE, Mini Mental State Examination.