Table 3 Item-total correlations and Cronbach's alphas for the ADCS-ADL-MCI at baseline and month 36
ADCS-ADL-MCI Item | Item-total correlations Spearman Correlations (p-value)a | Cronbach’s alphab | ||
|---|---|---|---|---|
Baseline (n = 768) | Month 36 (n = 477) | Baseline (n = 768) | Month 36 (n = 477) | |
Item 1 | 0.14 (0.0002) | 0.47 (< .0001) | 0.633/0.616 | 0.863/0.891 |
Item 2 | 0.13 (0.0005) | 0.44 (< .0001) | 0.631/0.614 | 0.864/0.889 |
Item 3 | 0.07 (0.0473) | 0.37 (< .0001) | 0.636/0.628 | 0.867/0.892 |
Item 4 | 0.08 (0.0418) | 0.42 (< .0001) | 0.635/0.623 | 0.867/0.893 |
Item 5 | 0.14 (0.0027) | 0.42 (< .0001) | 0.630/0.612 | 0.869/0.893 |
Item 6 | 0.32 (< .0001) | 0.49 (< .0001) | 0.611/0.605 | 0.862/0.892 |
Item 7 | 0.14 (0.0011) | 0.28 (< .0001) | 0.634/0.617 | 0.870/0.896 |
Item 8 | 0.24 (< .0001) | 0.64 (< .0001) | 0.618/0.609 | 0.854/0.885 |
Item 9 | 0.32 (< .0001) | 0.67 (< .0001) | 0.591/0.589 | 0.853/0.884 |
Item 10 | 0.21 (< .0001) | 0.50 (< .0001) | 0.641/0.621 | 0.866/0.893 |
Item 11 | 0.22 (< .0001) | 0.60 (< .0001) | 0.617/0.604 | 0.856/0.886 |
Item 12 | 0.24 (< .0001) | 0.52 (< .0001) | 0.601/0.596 | 0.862/0.891 |
Item 13 | 0.34 (< .0001) | 0.56 (< .0001) | 0.592/0.600 | 0.861/0.892 |
Item 14 | 0.39 (< .0001) | 0.62 (< .0001) | 0.582/0.594 | 0.856/0.889 |
Item 15 | 0.26 (< .0001) | 0.55 (< .0001) | 0.617/0.592 | 0.860/0.887 |
Item 16 | 0.17 (< .0001) | 0.46 (< .0001) | 0.626/0.617 | 0.864/0.890 |
Item 17 | 0.13 (0.0004) | 0.46 (< .0001) | 0.635/0.630 | 0.864/0.890 |
Item 18 | 0.12 (0.0007) | 0.37 (< .0001) | 0.632/0.618 | 0.867/0.893 |
Total Score: Cronbach’s alpha | - | - | 0.635/0.624 | 0.869/0.896 |