Psychometric properties of the Alzheimer’s Disease Cooperative Study – Activities of Daily Living for Mild Cognitive Impairment (ADCS-MCI-ADL) scale: a post hoc analysis of the ADCS ADC-008 trial

Table 4 Test–retest reliability: ADCS-ADL-MCI mean change scores and intraclass correlation coefficients between baseline and month 6

Definition of Stable Patients ^a	N (%)	Baseline Mean (SD) ADCS-ADL-MCI Total Score	Month 6 Mean (SD) ADCS-ADL-MCI Total Score	Mean Change (SD) in ADCS-ADL-MCI Total Score	t-test (p-value)	Intraclass Correlation Coefficient (95% Confidence Interval)
MCI-CGIC, GDS and CDR-SB	108 (16.49)	46.76 (4.35)	46.89 (4.21)	0.13 (3.19)	0.673	0.73 (0.62, 0.80)
MCI-CGIC, GDS and MMSE	69 (10.53)	46.90 (4.15)	46.70 (4.95)	-0.20 (4.02)	0.676	0.62 (0.45, 0.74)

N = 655 patients had an ADCS-ADL-MCI total score measured at both baseline and month 6
^a Stable patients defined as those who experienced "no change" on the MCI-CGIC at month 6 and those with a 0-point change between baseline and month 6 on the GDS and CDR-SB or on the GDS and MMSE

ISSN: 1471-2318