Table A3. PROMIS applied cognition - general concerns item set: Final IRT item parameters and DIF statistics for the race/ethnicity groups, non-Hispanic Whites are the reference group.
| Item name | Group | a | b1 | b2 | b3 | b4 | aDIF* | bDIF* |
|---|---|---|---|---|---|---|---|---|
| I have had trouble forming thoughts | Non-Hispanic White | 5.08 (0.14) | 0.04 (0.02) | 0.61 (0.01) | 1.13 (0.02) | 1.55 (0.03) | NS, Anchor item | |
| Non-Hispanic Black | ||||||||
| Hispanic | ||||||||
| Non-Hispanic Asian/Pacific Islander | ||||||||
| My thinking has been slow | Non-Hispanic White | 5.79 (0.16) | -0.07 (0.02) | 0.48 (0.01) | 1.05 (0.02) | 1.45 (0.03) | NS, Anchor item | |
| Non-Hispanic Black | ||||||||
| Hispanic | ||||||||
| Non-Hispanic Asian/Pacific Islander | ||||||||
| My thinking has been foggy | Non-Hispanic White | 6.45 (0.26) | 0.04 (0.02) | 0.59 (0.02) | 1.15 (0.03) | 1.60 (0.04) | ||
| Non-Hispanic Black | 5.85 (0.30) | 0.00 (0.02) | 0.56 (0.02) | 1.09 (0.03) | 1.57 (0.05) | 2.2 (0.136) | 6.3 (0.177) | |
| Hispanic | 6.43 (0.35) | 0.12 (0.02) | 0.60 (0.02) | 1.11 (0.03) | 1.51 (0.05) | 0.1 (0.923) | 13.7 (0.008) | |
| Non-Hispanic Asian/Pacific Islander | 7.98 (0.54) | 0.08 (0.02) | 0.62 (0.02) | 1.19 (0.04) | 1.53 (0.05) | 6.3 (0.012) | 4.4 (0.351) | |
| I have had trouble concentrating | Non-Hispanic White | 6.25 (0.24) | -0.07 (0.02) | 0.50 (0.02) | 1.07 (0.03) | 1.49 (0.04) | ||
| Non-Hispanic Black | 6.43 (0.34) | -0.08 (0.02) | 0.50 (0.02) | 1.05 (0.03) | 1.42 (0.04) | 0.2 (0.665) | 1.7 (0.793) | |
| Hispanic | 6.86 (0.38) | -0.08 (0.02) | 0.46 (0.02) | 1.03 (0.03) | 1.44 (0.04) | 1.9 (0.171) | 2.0 (0.740) | |
| Non-Hispanic Asian/Pacific Islander | 7.51 (0.48) | -0.03 (0.02) | 0.54 (0.02) | 1.15 (0.04) | 1.51 (0.05) | 5.5 (0.019) | 8.0 (0.090) | |
| I have had to work really hard to pay attention or I would make a mistake | Non-Hispanic White | 6.54 (0.19) | 0.02 (0.01) | 0.58 (0.01) | 1.09 (0.02) | 1.53 (0.03) | NS, Anchor item | |
| Non-Hispanic Black | ||||||||
| Hispanic | ||||||||
| Non-Hispanic Asian/Pacific Islander | ||||||||
| It has seemed like my brain was not working as well as usual | Non-Hispanic White | 7.24 (0.30) | -0.07 (0.02) | 0.44 (0.02) | 0.94 (0.02) | 1.38 (0.03) | ||
| Non-Hispanic Black | 6.83 (0.38) | 0.02 (0.02) | 0.53 (0.02) | 1.02 (0.03) | 1.45 (0.04) | 0.7 (0.392) | 20.9 (<0.001) | |
| Hispanic | 7.37 (0.20) | 0.05 (0.02) | 0.50 (0.02) | 1.04 (0.03) | 1.43 (0.05) | <0.1 (0.883) | 31.3 (<0.001) | |
| Non-Hispanic Asian/Pacific Islander | 7.37 (0.20) | -0.02 (0.02) | 0.51 (0.03) | 1.01 (0.04) | 1.39 (0.05) | 0.6 (0.442) | 10.0 (0.040) | |
| I have had to work harder than usual to keep track of what I was doing | Non-Hispanic White | 7.35 (0.22) | 0.02 (0.01) | 0.52 (0.01) | 1.00 (0.02) | 1.38 (0.02) | NS, Anchor item | |
| Non-Hispanic Black | ||||||||
| Hispanic | ||||||||
| Non-Hispanic Asian/Pacific Islander | ||||||||
| I have had trouble shifting back and forth between different activities that require thinking | Non-Hispanic White | 6.64 (0.27) | 0.07 (0.02) | 0.61 (0.02) | 1.06 (0.02) | 1.48 (0.03) | ||
| Non-Hispanic Black | 7.11 (0.41) | 0.06 (0.02) | 0.56 (0.02) | 1.08 (0.03) | 1.38 (0.04) | 0.9 (0.335) | 8.5 (0.074) | |
| Hispanic | 7.14 (0.20) | 0.03 (0.02) | 0.55 (0.02) | 1.01 (0.03) | 1.43 (0.05) | 3.5 (0.062) | 6.1 (0.192) | |
| Non-Hispanic Asian/Pacific Islander | 7.14 (0.20) | -0.00 (0.02) | 0.56 (0.03) | 1.05 (0.04) | 1.36 (0.05) | <0.1 (0.972) | 13.1 (0.011) | |
*
Statistical test for differences in parameters is Wald test using 1 df for the test of differences in the a parameters for the comparison groups and 2 df for the test of differences in the b parameters.
*
Bolded entries indicate items that evidence DIF after correction for multiple comparisons; “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.