TABLE 2.
Differential item functioning among demographic groups of the PROMIS Social Relationships Short Forms
| Items | DIF test P‐value | |
|---|---|---|
| Age group | Education group | |
| Emotional Support 01 | 0.319 | 0.116 |
| Emotional Support 02 | 0.420 | 0.872 |
| Emotional Support 03 | 0.333 | 0.182 |
| Emotional Support 04 | 0.524 | 0.332 |
| Informational Support 01 | 0.179 | 0.092 |
| Informational Support 02 | 0.389 | 0.369 |
| Informational Support 03 | 0.428 | 0.255 |
| Informational Support 04 | 0.274 | 0.304 |
| Instrumental Support 01 | 0.261 | 0.086 |
| Instrumental Support 02 | 0.197 | 0.641 |
| Instrumental Support 03 | 0.160 | 0.394 |
| Instrumental Support 04 | 0.258 | 0.524 |