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Table 3 Relation of Fatigue Severity Scale, number of tender points and orthostatic intolerance to dO2Hb and dHHb

From: Submaximal exercise testing with near-infrared spectroscopy in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome patients compared to healthy controls: a case–control study

 

FSS

Number of tender points

Orthostatic intolerance

Spearman’s rho

P

Spearman’s rho

P

Yes*

No*

P

dO2Hb (AU)

0.198

0.5

−0.2293

0.4

−0.4 (−5.0;0.52)

0.6 (−4.2;2.3)

0.9

dHHb (AU)

−0.2385

0.4

0.0785

0.8

5.3 (4.3;10.0)

4.2 (2.7;12.4)

0.9

  1. N = 16
  2. P value are Spearman’s rank correlation coefficient for FSS and number of tender points and rank sum for orthostatic intolerance.
  3. FSS Fatigue Severity Scale, dO 2 Hb delta-oxy-hemoglobin, dHHb delta-deoxy-hemoglobin and AU arbitrary unit.
  4. * Median (IQR).