Fatigue characteristics in multiple sclerosis: the North American Research Committee on Multiple Sclerosis (NARCOMS) survey

Table 2 Mean fatigue scores by fatigue severity in NARCOMS respondents^a

Fatigue scale	Mild/Moderate Fatigue-mean score (± sd) (N = 2386)	Severe Fatigue-mean score (± sd) (N = 6691)
MFIS^b
Total MFIS (± sd)	24.5 (± 14.5)	51.1 (± 14.4)
Physical (± sd)	12.5 (± 7.4)	25.7 (± 6.2)
Cognitive (± sd)	9.8 (± 7.5)	20.3 (± 8.8)
Psychosocial (± sd)	2.2 (± 1.8)	5.2 (± 1.8)
FSS
Total FSS (± sd)	23.7 (± 8.8)	52.4 (± 7.7)

MFIS, Modified Fatigue Impact Scale; FSS, Fatigue Severity Scale.
^aMild/moderate fatigue = FSS score <36; severe fatigue = FSS score ≥ 36
^bScore ranges = MFIS: Total MFIS 0–84, MFIS physical subscale 0–36, MFIS cognitive subscale 0–40, MFIS psychosocial subscale 0–8; FSS 9–63

ISSN: 1477-7525