Fatigue Is Associated with Poor Sleep in People with Multiple Sclerosis and Cognitive Impairment

Table 3

Associations between fatigue (MFIS and FSS scores), sleep quality components (PSQI component scores), and demographic characteristics.

	Fatigue scale
	MFIS		FSS
	𝐹 value	𝑃	𝐹 value	𝑃
Age years	7.71	0.01	0.12	0.73
Gender	0.08	0.78	1.25	0.27
Type of MS	0.02	0.89	2.69	0.10
Disease duration	1.36	0.25	0.80	0.37
EDSS	8.15	0.01	3.22	0.08
PSQI component scores
(1) Sleep quality	5.76	0.02	3.68	0.06
(2) Sleep latency	0.04	0.83	0.00	0.98
(3) Sleep duration	6.36	0.01	3.77	0.05
(4) Sleep efficiency	1.47	0.23	0.47	0.50
(5) Sleep medications	0.66	0.42	0.22	0.64
(6) Sleep disturbances	0.12	0.73	0.44	0.51
(7) Daytime dysfunction	13.50	<0.01	4.60	0.03

MFIS: Modified Fatigue Impact Scale, FSS: Fatigue Severity Scale, PSQI: Pittsburg Sleep Quality Index, EDSS: expanded disability status scale.
Bolded values indicate statistically significant associations.