Table 6.

Interaction between aging and education levels in CAF performance.

Education groups	£ 75years' old				> 75 years' old
	Mean	SD	Cutoff		Mean	SD	Cutoff
0 years	11.43	3.94	3.55		11.56	3.32	4.92
1-4 years	14.02	3.69	6.64		13.24	3.59	6.06
5-8 years	14.59	4.10	6.39		13.66	3.81	6.04
9-11 years	15.59	4.30	6.99		14.82	3.73	7.36
≥12 years	17.21	4.98	7.25		17.36	4.15	9.06

SD, standard deviation; Cutoff < -2.0 SDs from mean, abnormal performance.