Table 3. The factorial validity of Turkish MFI-20.

	Standardized estimate values	Measurement error variances	Relationship between the factors
GF-item-1	0.79	0.60	GF -> RA	-0.33
GF-item-5	0.71	0.58	GF -> PF	0.27
GF-item-12	0.80	0.59	GF -> MF	0.31
GF-item-16	0.71	0.47	GF -> RM	-0.32
RA-item-3	0.71	0.45	RA -> PF	-0.28
RA-item-6	0.76	0.52	RA -> MF	0.37
RA-item-10	0.70	0.41	RA -> RM	0.46
RA-item-17	0.70	0.42	PF -> MF	0.28
PF-item-2	0.84	0.61	PF -> RM	-0.27
PF-item-8	0.90	0.63	MF -> RM	0.37
PF-item-14	0.76	0.59
PF-item-20	0.72	0.43
MF-item-7	0.70	0.38
MF-item-11	0.70	0.40
MF-item-13	0.80	0.60
MF-item-19	0.84	0.63
RM-item-4	0.71	0.57
RM-item-9	0.72	0.59
RM-item-15	0.70	0.56
RM-item-18	0.84	0.61
MFI-20: Multidimensional fatigue inventory-20; GF: General fatigue; RA: Reduced activity; PF: Physical fatigue; MF: Mental fatigue; RM: Reduced motivation.