Table 3. Test-retest reliability coefficients (Kappa) for the SOFA/GP-K.
| Items | Percent agreement (%) | Kappa score |
|---|---|---|
| 1. Tired for a long time after activity | 62.3 | 0.37 |
| 2. Poor concentration | 69.6 | 0.49 |
| 3. Muscle tiredness after activity | 62.3 | 0.33 |
| 4. Headaches | 79.0 | 0.64 |
| 5. Sleep for a long time | 56.5 | 0.34 |
| 6. Muscle aches after activity | 55.1 | 0.28 |
| 7. Sleep poorly | 68.1 | 0.53 |
| 8. Problems with speech | 70.3 | 0.50 |
| 9. Poor memory | 71.0 | 0.48 |
| 10. Muscle pain at rest | 81.2 | 0.51 |
SOFA/GP-K, Korean Schedule of Fatigue and Anergia/General Physician.