Table 5 Discriminant validity of the B-FIQ in FM patients, healthy controls, and RA patients
FIQ questions | Group | P* | Group | P* | ||
|---|---|---|---|---|---|---|
FM patients | Healthy controls | FM patients | RA patients | |||
(n = 102) | (n = 50) | (n = 102) | (n = 50) | |||
Physical function | 4.96 ± 2.47 | 0.92 ± 0.90 | <0.001 | 4.96 ± 2.47 | 3.30 ± 0.43 | <0.001 |
Days felt good | 5.03 ± 2.09 | 0.20 ± 0.63 | <0.001 | 5.03 ± 2.09 | 2.54 ± 0.41 | <0.001 |
Workdays missed | 1.72 ± 0.24 | 0.0 ± 0.0 | <0.001 | 1.72 ± 0.24 | 1.32 ± 0.35 | 0.150 |
Ability to do job | 7.26 ± 2.49 | 0.28 ± 0.11 | <0.001 | 7.26 ± 2.49 | 3.98 ± 0.47 | <0.001 |
Pain | 7.55 ± 2.27 | 0.95 ± 0.16 | <0.001 | 7.55 ± 2.27 | 3.51 ± 0.42 | <0.001 |
Morning tiredness | 8.02 ± 2.69 | 1.70 ± 0.26 | <0.001 | 8.02 ± 2.69 | 4.64 ± 0.48 | <0.001 |
Fatigue | 6.89 ± 2.98 | 0.43 ± 0.17 | <0.001 | 6.89 ± 2.98 | 3.54 ± 0.48 | <0.001 |
Stiffness | 5.22 ± 3.30 | 0.30 ± 0.13 | <0.001 | 5.22 ± 3.30 | 3.53 ± 0.46 | 0.005 |
Anxiety | 7.72 ± 2.75 | 2.39 ± 0.33 | <0.001 | 7.72 ± 2.75 | 5.07 ± 0.50 | <0.001 |
Depression | 7.21 ± 2.80 | 2.46 ± 0.29 | <0.001 | 7.21 ± 2.80 | 4.40 ± 0.45 | <0.001 |
Total | 64.75 ± 16.47 | 9.67 ± 6.69 | <0.001 | 64.75 ± 16.47 | 37.56 ± 3.66 | <0.001 |