Table 4.

CSF Concentrations of Neurotransmitters

Monoamine Metabolite (Median, IQR)	Control (n=12)	Interferon-alpha (n=12)	p-value1
HVA (ng/ml)	104.7 (60.15)	76.8 (63.20)	0.27
5-HIAA (ng/ml)	33.45 (21.55)	29.60 (21.70)	0.16
MHPG (ng/ml)	16.80 (5.55)	15.65 (5.00)	0.45

IQR – Interquartile range

¹Exact Wilcoxon Rank Sum test;

^*indicates significance after adjustment for multiple comparisons

HVA-homovanillic acid; 5-HIAA-5-hydroxyindoleacetic acid; MHPG-3-methoxy-4-hydroxyphenylglycol