Table 5.
Differential item functioning (DIF) on age (adults and older adults) and gender (male and female)
| Items | DIF on age | DIF on gender | ||||||
| MS | F | DF | Prob | MS | F | DF | Prob | |
| Feel nervous (2) | 0.58 | 0.88 | 1 | 0.35 | 0.59 | 0.91 | 1 | 0.34 |
| Feel so nervous (3) | 1.00 | 1.86 | 1 | 0.17 | 0.06 | 0.11 | 1 | 0.74 |
| Feel hopeless (4) | 0.07 | 0.08 | 1 | 0.78 | 2.41 | 2.59 | 1 | 0.11 |
| Feel restless or fidgety (5) | 0.49 | 0.67 | 1 | 0.41 | 0.66 | 0.89 | 1 | 0.35 |
| Feel so restless (6) | 0.50 | 0.92 | 1 | 0.34 | 0.00 | 0.00 | 1 | 0.98 |
| Everything was an effort (8) | 0.12 | 0.17 | 1 | 0.68 | 0.26 | 0.36 | 1 | 0.55 |
| Feel so sad (9) | 5.29 | 6.86 | 1 | 0.01 | 0.80 | 1.04 | 1 | 0.31 |