Table 3.

The demographics of three age groups.

Class	Healthy Y/M adults	Healthy Old adults	Geriatric without CI
Age range	18–65	>65	>65
Age (mean ± SD)	42.72 ± 16.6	74.58 ± 5.71	79.3 ± 5.81
Number of subjects	57	55	127
Gender	30 M/27 F	25 M/20 F	62 M/65 F

The abbreviations in Table 3 are: standard deviation (SD), male (M), female(F), young-middle aged(Y/M), cognitive impairment (CI).