21
|
Trouble remembering like appointments and when to take medication
|
− 0.072
|
0.058
|
2.764*
|
20.271
|
0.005*
|
22
|
Trouble thinking clearly
|
0.498
|
0.061
|
− 1.078
|
34.33
|
< 0.001a
|
23
|
Trouble concentrating
|
− 0.427
|
0.060
|
− 0.918
|
21.292
|
0.003a
|
Final model: cognitive domain—3 items (raw score range: 0–12)
|
Mean
|
− 1.813
|
Standard deviation
|
1.764
|
Sample size
|
730
|
Chi-square statistic (df) p value
|
75.8970 (df: 21); p < 0.001
|
Cronbach’s alpha
|
0.77602
|
Person Separation Index
|
0.70994
|
Unidimensionality t-test (% significant)
|
1.23%
|
Differential Item Functioning (DIF)
|
None
|