Table 3.

Effects of treatment on the prevalence of additional symptoms according to the Centers of Disease Control criteria. Values are means (SD)

	Symptom score†
Condition*	0 months	5 months	Treatment effect (95% CI)	P value
Unrefreshing sleep
Cognitive behaviour	3.4 (1.0)	2.5 (1.1)	−1.2 (−1.8 to −0.6)	0.001
Waiting list	2.7 (0.6)	3.2 (0.8)
Muscle pain
Cognitive behaviour	2.7 (1.1)	2.4 (1.0)	−1.1 (−1.6 to −0.6)	0.001
Waiting list	1.8 (0.9)	2.7 (0.8)
Impaired concentration
Cognitive behaviour	2.9 (1.1)	2.4 (1.2)	−1.1 (−1.5 to −0.65)	0.001
Waiting list	2.0 (0.9)	2.7 (0.8)
Tiredness after exercise
Cognitive behaviour	3.5 (0.7)	2.5 (1.1)	−1.0 (−1.5 to −0.5)	0.001
Waiting list	2.8 (0.3)	2.9 (0.3)
Headache
Cognitive behaviour	2.9 (0.8)	2.6 (0.9)	−0.05 (−0.9 to 0.0)	0.033
Waiting list	2.3 (0.9)	2.5 (0.8)
Impaired memory
Cognitive behaviour	2.1 (1.2)	1.8 (1.1)	−0.4 (−0.93 to 0.1)	0.12
Waiting list	2.2 (1.0)	2.4 (1.0)
Multi-joint pain
Cognitive behaviour	2.5 (1.2)	2.0 (1.2)	−0.2 (−0.7 to 0.3)	0.38
Waiting list	2.6 (0.6)	2.3 (0.9)
Sore throat
Cognitive behaviour	1.8 (0.8)	1.6 (0.8)	0.2 (−0.3 to −0.7)	0.40
Waiting list	2.3 (0.8)	1.9 (0.7)
Sensitive lymph nodes
Cognitive behaviour	1.8 (1.0)	1.6 (0.9)	0.0 (−0.4 to 0.6)	0.72
Waiting list	1.8 (0.9)	1.5 (0.9)

^*Cognitive behaviour therapy n=35; waiting list n=34.

^†Symptoms rated on 4 point Likert scale (never to every day), range 1 to 4.