Table 5. Standardized total test scores after item selection.

	Test A	Test B
Cronbach’s Alpha	0.91	0.90
T-scores*
Mean [95% Confidence Interval]
Controls	50.00 [31.49; 68.05]	50.00 [27.50; 72.52]
MCI/Mild Dementia	9.03 [−7.20; −25.26]	−6.56 [−34.69; 21.84]
Correlation with MMSE score	0.39	0.52
Spearman’s R (linear regression p-value)	(p < 0.001)	(p < 0.001)
Correlation with MoCA score	0.52	0.62
Spearman’s R (linear regression p-value)	(p < 0.001)	(p < 0.001)
Minimal important difference (MID)	40.97	56.82
Smallest real difference (SRD)	37.89	43.04
Difference of MID and SRD (%)	7.5%	23.9%
Area under the ROC curve	0.74	0.75

MCI – mild cognitive impairment; ROC – Receiving operator characteristic; MoCA – Montreal Cognitive Assessment; MMSE – Cognitive Assessment and Mini Mental State Examination.

^*Sum of the standardized subtest scores transformed to a T-distribution.