Altered neuroendocrine control and association to clinical symptoms in adolescent chronic fatigue syndrome: a cross-sectional study

Table 7 Association between single hormones and clinical markers in CFS patients—correlation and regression analyses

	Fatigue score			Steps per day
	Kendall correlation	Pearson correlation	Bivariate linear regression	Kendall correlation	Pearson correlation	Bivariate linear regression
Plasma norepinephrine
Coefficient (correlation/regression)	−0.061	−0.078	−0.001	−0.034	−0.002	−0.005
P value	0.345	0.405	0.401	0.588	0.987	0.987
Urine norepinephrine:creatinine ratio
Coefficient (correlation/regression)	−0.071	−0.105	−1.43	0.096	0.152	871
P value	0.271	0.264	0.296	0.124	0.100	0.107
Plasma epinephrine
Coefficient (correlation/regression)	−0.075	−0.156	−0.008	0.089	0.117	2.35
P value	0.245	0.095	0.101	0.155	0.209	0.206
Urine epinephrine:creatinine ratio
Coefficient (correlation/regression)	−0.048	−0.093	−0.885	−0.001	0.011	42
P value	0.455	0.318	0.321	0.983	0.906	0.906
Plasma cortisol
Coefficient (correlation/regression)	−0.045	−0.066	−0.003	−0.078	−0.081	−1.27
P value	0.480	0.480	0.479	0.213	0.385	0.398
Urine cortisol:creatinine ratio
Coefficient (correlation/regression)	0.018	0.057	0.358	0.082	0.242	743
P value	0.785	0.540	0.666	0.190	0.006	0.022

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