Table 1– Self-report fatigue measurements used in existing sarcoidosis studies and the psychometric properties in sarcoidosis
Measures used to assess fatigueReliability in sarcoidosisValidity in sarcoidosisStudies using the measures
Borg fatigue score[20]
CISConstruct validity examined using one scale [13][9, 13]
CRDQ fatigue domain[20]
FACIT-F[35]
FASCronbach’s α is good [25, 28]
Test–retest reliability is good [7, 28]
Sensitivity to change appears good [7]
Content validity shows one underlying factor [25, 28]
Construct validity is good [16, 17, 28]
MCID (four-point change) [37]
No floor and ceiling effects [25]
Discriminant validity is good [25]
[5, 7, 10, 16–18, 25, 27–29, 31, 35]
Fatigue Scale[23]
Interview[6, 15, 24, 33]
Multidimensional fatigue inventoryConstruct validity (examined using a single item) seems good [17][8, 17]
SF-36 vitality scaleConstruct validity examined using one scale [13][13, 34, 36]
Symptom inventory questionnaire[6, 15, 19, 26, 30]
WHOQOL-100 energy and fatigue facetConstruct validity examined using one scale [19][14, 15, 19, 26, 28]
  • CIS: Checklist Individual Strength; CRDQ: Chronic Respiratory Disease Questionnaire; FACIT-F: Functional Assessment of the Chronic Illness Therapy – Fatigue; FAS: Fatigue Assessment Scale; SF: Short Form; WHOQOL: World Health Organization questionnaire of Quality of Life; MCID: minimal clinically important difference.