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Reliability of the FSS
| FSS scores | Treatment-naïve (PILLAR) | Treatment-experienced (ASPIRE) |
|---|---|---|
| Test-retest reliabilitya |
|
|
| ICC |
0.74 |
0.86 |
| Pearson’s correlation |
0.74 |
0.86 |
| Internal consistency |
|
|
| Cronbach’s α | 0.95 | 0.96 |
FSS Fatigue Severity Scale, ICC intraclass correlation.
aTest-retest reliability was calculated using data from Week 12 and Week 24, using only stable patients defined by a change in hemoglobin of <0.5 g/dL.
