Legend. The results are presented using normalized fatigue scores from 0 to 100 with mean differences of fatigue score and 95% confidence interval for all seven contrast categories, and regression lines. The plotted lines represent the regression of differences against integer scores (i.e., inverse regression).
Abbreviations. FSS: Fatigue Severity Scale, VT: Vitality scale of the MOS-SF36, MAF: Multidimensional Assessment of Fatigue, MFI: Multidimensional Fatigue Inventory, FACIT–F: Functional Assessment of Chronic Illness Therapy–Fatigue scale, CFS: Chalder Fatigue Scale, RS: global assessment of fatigue using a 10-point numerical Rating Scale.