Table 3

Comparisons across time within the secondary outcome measures within the overall sample

NBaseline3-Month follow-upComparisons
PercentilesPercentilesz Statisticp Value
LowerMdnUpperLowerMdnUpper
CDC CFS sore throat7001.54012−2.2570.024*
CDC CFS swollen lymph nodes/glands71026014−1.5670.115
CDC CFS diarrhoea72014002−2.4810.013*
CDC CFS fatigue after exertion72915206.5001216−3.5740.001***
CDC CFS muscle aches/pains7249121.250612−3.9950.001***
CDC CFS pain in joints70049016−2.9080.004**
CDC CFS fever70001000−1.6670.095
CDC CFS chills72026002.113−4.2060.001***
CDC CFS unrefreshing sleep72612164616−2.2950.022*
CDC CFS sleeping problems7228122412−1.9830.047*
CDC CFS headaches711691611.250−2.8500.004**
CDC CFS memory problems7226121611.250−2.0530.040*
CDC CFS difficulty concentrating722.5008.500121612−3.4400.001***
CDC CFS nausea71014026−0.8980.369
CDC CFS abdominal pain71026026−1.9320.053
CDC CFS sinus nasal symptoms71146016−2.8620.004**
CDC CFS shortness of breath69024014−2.4020.016*
CDC CFS sensitivity to light71026014−2.3880.017*
CDC CFS depression72026014−2.2970.022*
MHLCS internal720.5280.6810.7990.6110.7220.889−2.9620.003**
MHLCS chance720.2220.3440.4170.2010.3200.444−1.5520.121
MHLCS powerful others720.3330.3890.5000.3060.3610.500−1.6010.109
MHLCS doctors720.08330.1390.2220.0830.1110.194−2.3810.017*
MHLCS other people720.1940.2500.30560.1740.2500.278−1.1860.236
  • *Significant at 0.05 level.

  • **Significant at 0.01 level.

  • ***Significant at 0.001 level.

  • CDC CFS, Centers for Disease Control Chronic Fatigue Syndrome Inventory; CFS, chronic fatigue syndrome; Mdn, median; MHLCS, Multidimensional Health Locus of Control Scale.