Frequency of fatigue scales overall and subdivided by study type (clinical trial vs observational).
| Measures | SLE Instruments Used, n = 381 | SLE Instruments in Observational Studies, n = 261 | SLE Instruments in SLE Clinical Trials, n = 12 |
|---|---|---|---|
| Visual analog scale | 9 (24) | 7 (27) | 2 (17) |
| Krupp Fatigue Severity Scale | 15 (39) | 10 (38) | 5 (42) |
| Functional Assessment of Chronic Illness Therapy Fatigue scale | 6 (16) | 4 (15) | 2 (17) |
| Multidimensional Assessment of Fatigue | 2 (5.3) | 2 (7.7) | – |
| Multidimensional Fatigue Inventory | 3 (7.9) | 2 (7.7) | 1 (8) |
| Fatigue Assessment Scale | 1 (2.6) | – | 1 (8) |
| Brief Fatigue Inventory | 1 (2.6) | – | 1 (8) |
| Vanderbilt Fatigue Score | 1 (2.6) | 1 (3.8) | – |
Values are n (%).
↵1 One study used 2 fatigue measures (37 studies included, but 38 instruments used). SLE: systemic lupus erythematosus.