Table 4 Summary results of the Rasch measurement theory analysis of 1) the EORTC QLQ-C30 FA items, 2) the EORTC QLQ-C30 and supplemental FA items, and 3) the EORTC QLQ-C30 and supplemental items assessing fatigue and other anemia-related symptoms
EORTC QLQ-C30 Fatigue | EORTC QLQ-C30 Fatigue and supplemental items | Fatigue and other anemia-related symptoms | |||||||
|---|---|---|---|---|---|---|---|---|---|
Disordered threshold | Fit residuals | PSI | Disordered threshold | Fit residuals | PSI | Disordered threshold | Fit residuals | PSI | |
Need to rest | No | −0.375 | 0.82 | No | 0.515 | 0.90 | No | −0.205 | 0.89 |
Felt weak | No | −0.171 | No | 0.462 | No | −0.021 | |||
Were you tired | No | 0.242 | No | 0.159 | No | −0.760 | |||
Weak in arms or legs | No | 0.233 | No | 0.244 | |||||
Become easily tired | No | −2.091 | No | −1.171 | |||||
Lacked energy | No | −0.917 | No | −0.506 | |||||
Were you short of breath | No | 0.777 | |||||||
Shortness breath on exertion | No | 0.660 | |||||||
Stop for breath when walking | No | 1.357 | |||||||
Been dizzy | No | 0.777 | |||||||