Table 4.

Results of group comparisons between executive functions performance among non-demented elderly stratified by age.

	Total sample	Age groups			Group comparisons
		1—Young-Old	2—Old-Old	3—Oldest-Old	X2	p	Differences between age groups
Age ranges	60–91	60–69	70–79	>80
FAB (total score)	12.32 ± 3.294	14.33 ± 2.353	12.34 ± 3.171	10.54 ± 3.148	17.557	0.032	2 > 3
					32.250	< 0.001	1 > 3
FAB—categorization	1.505 ± 1.071	1.958 ± 0.908	1.456 ± 1.110	1.208 ± 1.021	18.479	0.046	1 > 3
FAB—fonemic fluency	2.147 ± 0.989	2.625 ± 0.711	1.978 ± 1.022	2.083 ± 0.974	17.280	0.019	1 > 2
FAB—motor programming	1.726 ± 0.950	2.042 ± 0.806	1.782 ± 0.987	1.333 ± 0.917	19.000	0.031	1 > 2
					24.750	0.003	1 > 3
FAB—sensitivity to interference	2.357 ± 1.051	2.708 ± 0.751	2.326 ± 1.097	2.083 ± 1.176	2.988	0.131	–
FAB—inhibitory control	1.589 ± 1.180	2.000 ± 1.142	1.782 ± 1.153	0.875 ± 0.947	19.910	0.006	2 > 3
Five digit test inhibitory control	3.730 ± 5.535	2.940 ± 5.048	3.360 ± 5.709	5.110 ± 5.516	7.232	0.027	1 > 3
Five digit test cognitive flexibility	8.980 ± 8.611	7.330 ± 7.191	7.670 ± 7.680	12.860 ± 10.101	8.184	0.017	1 > 3
							2 > 3
Digit span backward	11.480 ± 9.573	13.920 ± 13.061	10.960 ± 8.565	10.570 ± 7.675	0.735	0.692	–

Values are frequencies or Mean ± Standard Deviation (SD); FAB, Frontal Assessment Battery.