Table A7. PROMIS applied cognition - general concerns item set: Final IRT item parameters and DIF statistics for the language groups for Hispanics only (English & Spanish), with English interview as the reference group.
| Item name | Group | a | b1 | b2 | b3 | b4 | aDIF* | bDIF* |
|---|---|---|---|---|---|---|---|---|
| I have had trouble forming thoughts | English | 4.51 (0.28) | -0.05 (0.05) | 0.61 (0.04) | 1.20 (0.05) | 1.66 (0.07) | NS, Anchor item | |
| Spanish | ||||||||
| My thinking has been slow | English | 5.02 (0.32) | -0.18 (0.05) | 0.49 (0.04) | 1.14 (0.05) | 1.60 (0.07) | NS, Anchor item | |
| Spanish | ||||||||
| My thinking has been foggy | English | 5.72 (0.42) | -0.02 (0.05) | 0.57 (0.04) | 1.19 (0.06) | 1.63 (0.07) | 0.3 (0.577) | 10.8 (0.029) |
| Spanish | 5.32 (0.53) | 0.15 (0.05) | 0.68 (0.05) | 1.25 (0.08) | 1.85 (0.13) | |||
| I have had trouble concentrating | English | 5.84 (0.38) | -0.20 (0.05) | 0.43 (0.04) | 1.12 (0.05) | 1.60 (0.07) | NS, Anchor item | |
| Spanish | ||||||||
| I have had to work really hard to pay attention or I would make a mistake | English | 5.37 (0.34) | -0.08 (0.05) | 0.54 (0.04) | 1.18 (0.05) | 1.73 (0.08) | NS, Anchor item | |
| Spanish | ||||||||
| It has seemed like my brain was not working as well as usual | English | 6.02 (0.39) | -0.04 (0.05) | 0.50 (0.04) | 1.13 (0.05) | 1.59 (0.07) | DIF not significant | |
| Spanish | ||||||||
| I have had to work harder than usual to keep track of what I was doing | English | 5.80 (0.38) | -0.09 (0.05) | 0.53 (0.04) | 1.05 (0.05) | 1.54 (0.07) | NS, Anchor item | |
| Spanish | ||||||||
| I have had trouble shifting back and forth between different activities that require thinking | English | 5.81 (0.42) | -0.03 (0.05) | 0.52 (0.04) | 1.09 (0.05) | 1.61 (0.07) | 5.8 (0.016) | 9.0 (0.062) |
| Spanish | 8.31 (0.97) | -0.12 (0.05) | 0.59 (0.05) | 1.06 (0.06) | 1.48 (0.09) | |||
*
Statistical test for differences in parameters is Wald test using I df fox the test of differences in the a parameters for the comparison groups and 2 df for the test of differences in the b parameters. “NS, Anchor item” refers to a non-significant DIF finding for the item during the initial iterative anchor item selection process. The “non-significant” designation refers to the second stage DIF detection procedure using the anchor items and testing the remaining items. The “non-significant” designation indicates that the item was not found to have DIF in the second stage of DIF detection.