Table 9.

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

	N	Baseline			3-Month follow-up			Comparisons
		Percentiles			Percentiles			z Statistic	p Value
		Lower	Mdn	Upper	Lower	Mdn	Upper
CDC CFS sore throat	29	0	0	3.500	0	1	2.030	−0.567	0.571
CDC CFS swollen lymph nodes/glands	31	0	2	4	0	1	3	−0.725	0.046
CDC CFS diarrhoea	31	0	2	4	0	0	2	−1.996	0.046*
CDC CFS fatigue after exertion	31	8	15	20	6	12	16	−2.392	0.017*
CDC CFS muscle aches/pains	31	2	6	12	1	6	9	−1.908	0.056
CDC CFS pain in joints	30	0	1.500	8	0	1	4	−1.680	0.093
CDC CFS fever	30	0	0	1	0	0	0.720	−1.383	0.167
CDC CFS chills	31	0	2	6	0	1	2.150	−2.049	0.040*
CDC CFS unrefreshing sleep	31	6	12	16	4	9	16	−1.513	0.130
CDC CFS sleeping problems	31	1	6	12	2	4	9	−1.794	0.073
CDC CFS headaches	31	2	6	9	1	3	6	−2.807	0.005**
CDC CFS memory problems	31	2	6	12	1	3	9	−1.446	0.148
CDC CFS difficulty concentrating	31	2	8	12	1	6	12	−1.899	0.058
CDC CFS nausea	31	0	1	6	0	2	6	−0.855	0.392
CDC CFS abdominal pain	31	0	1	6	0	2	4	−0.598	0.550
CDC CFS sinus nasal symptoms	31	0	5	8	0	1	4	−2.482	0.013*
CDC CFS shortness of breath	30	0	2	6	0	1	4	−0.976	0.329
CDC CFS sensitivity to light	31	0	1	6	0	1	4	−0.787	0.431
CDC CFS depression	31	0	2	6	0	1	6	−1.304	0.192
MHLCS internal	31	0.556	0.694	0.861	0.639	0.750	0.889	−1.755	0.079
MHLCS chance	31	0.222	0.333	0.361	0.167	0.306	0.417	−0.672	0.501
MHLCS powerful others	31	0.333	0.389	0.500	0.333	0.389	0.500	−0.577	0.564
MHLCS doctors	31	0.111	0.167	0.222	0.083	0.139	0.500	−1.384	0.166
MHLCS other people	31	0.167	0.250	0.278	0.194	0.250	0.306	−0.213	0.831

*Significant at 0.05 level.

**Significant at 0.01 level.

***Significant at 0.001 level.

CFS, chronic fatigue syndrome; Mdn, median; MHLCS, Multidimensional Health Locus of Control Scale.