Table 3.

MFI-20 scale item characteristics and internal consistency reliabilities.

			Inter-item correlation	Corrected-to-total correlation	Coefficient α if item deleted	Standardized Cronbach's
	Mean	SD	Mean (Range)	Range	Range	α
General Fatigue	12.90	4.68	0.56 (0.46-0.69)	0.59-0.70	0.77-0.84	0.83
Physical Fatigue	10.85	4.36	0.52 (0.44-0.61)	0.59-0.67	0.75-0.79	0.81
Reduced Activity	9.25	4.16	0.53 (0.41-0.66)	0.51-0.71	0.75-0.84	0.82
Reduced Motivation	9.58	3.90	0.38 (0.17-0.56)	0.33-0.62	0.57-0.75	0.71
Mental Fatigue	10.95	4.54	0.61 (0.53-0.66)	0.68-0.75	0.81-0.84	0.86
Total Fatigue Score	53.53	17.93	0.40 (0.11-0.68)	0.33-0.77	0.92-0.93	0.93