Importance of fatigue and its measurement in chronic liver disease

Table 2 Commonly used measures of fatigue

	Type of assessment	Domain(s) assessed	Length	Used in liver disease?
Fatigue assessment scale[103]	5-point Likert scale	Severity	10 items	Rarely
Fatigue severity scale[104]	7-point Likert scale	Severity, Impact	9 items	Often
Fatigue impact scale[105]	5-point Likert scale	Physical, Cognitive, Psychosocial	40 items	Sometimes
Fatigue scale[106]	4-point Likert scale	Physical, Mental	11 items	Rarely
Multidimensional Assessment of Fatigue[107]	Visual analog scale	Severity, Distress, Impact on Activities	14 items	Rarely
Multidimensional fatigue inventory[108]	5-point Likert scale	General, Physical, Activity, Motivation, Mental	20 items	Sometimes
Visual analog fatigue scale[109]	Visual analog scale	Energy, Fatigue	18 items	Rarely
Functional assessment of chronic illness therapy fatigue scale[110]	5-point Likert scale	Severity, Impact	13 items	Often
Sf-36 vitality scale[111]	5-point Likert scale	Energy	4 items	Often
Chronic liver disease questionnaire fatigue scale[112]	7-point Likert scale	Energy	5 items	Often
PROMIS®-fatigue[113]	5-point Likert scale	Severity	Variable1	Rarely

¹PROMIS® is a computer adaptive test where the specific questions and number of questions is tailored to the individual using item response theory techniques. Usually the number of items will range between 4-12.