Table 5

Comparisons across time within the secondary outcome measures within the psychology group

	N	Baseline			3-Month follow-up			Comparisons
		Percentiles			Percentiles			z Statistic	p Value
		Lower	Mdn	Upper	Lower	Mdn	Upper
CDC CFS sore throat	14	0	2	6	0	0	2.500	−1.365	0.172
CDC CFS swollen lymph nodes/glands	14	0	0.5	2.5	0	0	4	−0.341	0.733
CDC CFS diarrhoea	14	0	0	2	0	0	2.500	−0.730	0.465
CDC CFS fatigue after exertion	14	9	12	20	7.750	9	14	−1.550	0.121
CDC CFS muscle aches/pains	14	4	9	15.25	1.750	9	14	−2.145	0.032*
CDC CFS pain in joints	14	0	2.5	9	0	0.500	4.500	−1.778	0.075
CDC CFS fever	14	0	0	1.5	0	0	0.500	−0.135	0.892
CDC CFS chills	14	0	1	6.75	0	0	4.500	−1.970	0.049*
CDC CFS unrefreshing sleep	14	9	12	15.25	5.500	9	16	−0.802	0.422
CDC CFS sleeping problems	14	2.75	7	12	1	3	9.750	−1.738	0.082
CDC CFS headaches	14	1	2.5	6	0.750	1	6.750	−1.200	0.230
CDC CFS memory problems	14	1	6	9	0.750	1	6.750	−1.965	0.049*
CDC CFS difficulty concentrating	14	3.5	9	17	1	5	6.750	−2.809	0.005**
CDC CFS nausea	14	0	0	4.25	0	1	4.500	−0.213	0.832
CDC CFS abdominal pain	14	0	2	5.25	0	0	6	−0.343	0.732
CDC CFS sinus nasal symptoms	14	1	3.5	4.5	0	1.500	4.500	−0.724	0.469
CDC CFS shortness of breath	14	0	1.5	4.5	0	0.500	2.50	−1.556	0.120
CDC CFS sensitivity to light	14	0	1	4.5	0	0	1.250	−1.973	0.049*
CDC CFS depression	14	0	1.5	6	0	0	2	−1.614	0.106
MHLCS internal	14	0.556	0.653	0.840	0.611	0.872	0.923	−2.983	0.003**
MHLCS chance	14	0.326	0.417	0.535	0.167	0.361	0.451	−2.594	0.009**
MHLCS powerful others	14	0.319	0.375	0.451	0.299	0.356	0.431	0.000	1.000
MHLCS doctors	14	0.083	0.125	0.194	0.083	0.083	0.174	−1.122	0.262
MHLCS other people	14	0.194	0.236	0.285	0.194	0.222	0.257	−0.118	0.906

*Significant at 0.05 level.
**Significant at 0.01 level.
CDC CFS, Centers for Disease Control Chronic Fatigue Syndrome Inventory; CFS, chronic fatigue syndrome; Mdn, median; MHLCS, Multidimensional Health Locus of Control Scale.