Table 3.

Baseline demographics and frequency of completion and integrity failures across all visits for the longitudinal sample.

	iPad	PC	p
Demographics – Brief Battery	(n = 63)	(n = 63)
Age Mean (SD)	79.4 (5.43)	78.8 (5.46)	0.58
Years of Education Mean (SD)	14.3 (2.22)	14.5 (2.49)	0.74
Percent Male	57%	57%	1.00
Duration of follow-up (months)	16.2 (2.68)	17.3 (2.74)	0.02
Demographics – GMLT	(n = 25)	(n = 62)
Age Mean (SD)	75.6 (3.47)	78.6 (5.24)	0.009
Education Mean (SD)	15.4 (2.04)	14.5 (2.49)	0.11
Percent Male	60%	57%	0.95
Completion, n (%) failed
Detection	2 (1%)	0 (0%)	0.48
Identification	2 (1%)	0 (0%)	0.48
One Card Learning	0 (0%)	1 (1%)	1.00
One Back	1 (1%)	0 (0%)	1.00
Groton Maze Learning Test	0 (0%)	5 (5%)	0.29
Any integrity flag failed	2 (1%)	5 (3%)	0.45
Integrity, n (%) failed
Detection	12 (6%)	14 (7%)	0.84
Identification	10 (5%)	3 (2%)	0.09
One Card Learning	9 (5%)	5 (3%)	0.42
One Back	4 (2%)	4 (2%)	1.00
Groton Maze Learning Test	1 (2%)	1 (1%)	1.00
Any integrity flag failed	31 (16%)	25 (13%)	0.47

Note. Overall failures were counted once even if more than one portion of Cogstate was failed for that participant’s visit. Thus overall count may differ from the sum of the parts. PC = personal computer; SD = standard deviation. P-values reported above are from linear model ANOVAs (continuous variables) or Pearson’s Chi-square test (frequencies).