Table 2.

Comparison of self-reported frequency of Fukuda criteria symptoms in the preceding 2 weeks.

	ME/CFS (n = 55)(%)	HC (n = 55)(%)	P
FUKUDA CRITERIA
Fatigue (several times/week or more)	100	5	<0.001
Unrefreshing sleep (most/all of the time)	98	18	<0.001
Post-exertional malaise (at least once in 2 weeks)	95	7	<0.001
Cognitive impairment (at least several times/week)	82	2	<0.001
Headache (several times/week or more)	77	18	<0.001
Body pain (several times/week or more)	69	20	<0.001
Sore throat (at least once/week)	51	7	<0.001
Joint aches (several times/week or more)	44	20	0.01
Tender glands (at least once/week)	40	2	<0.001