The Journal of Headache and Pain

Table 3 Normal reference intervals for plasma concentrations of tryptophan metabolites

From: Tryptophan metabolites and gut microbiota play an important role in pediatric migraine diagnosis

Variables	Mean/Median(n = 120)	Lower limit	Upper limit
TRP	451.90^b	266.48^b	720.79^b
5-HT	343.87^a	325.42^a	362.33^a
KYN	3.30^b	1.31^b	4.25^b
KYNA	617.63^a	598.76^a	636.50^a
QUIN	254.39^a	248.30^a	260.48^a

^anormally distributed data, represented by Mean (95% CI);
^bnonnormally distributed data, represented by Median (P2.5, P97.5)

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ISSN: 1129-2377

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